Question about Computers & Internet

Solve for the unknown variable

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Posted on Jan 02, 2017

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SOURCE: I am a number . If you double me and add 20 the

Hi jemal

Do you have a problem with your monster, perhaps I can help.

If you need an answer for a school assignment , try listening in class

Posted on Dec 04, 2011

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Colt Police Positive 32 38 Special Production Information

Oct 05, 2015 | Optics

This calculator cannot do algebra so it does not handle polynomials. It does not have an EQN (equation) solving mode so you cannot enter an expression set = 0 and solve it for an unknown variable X.

It does have a table Mode where you can enter an expression y= F(X) and generate a table of values. If in the expression F(x) a numerical coefficient is a fraction just enter it as a fraction, possibly enclosed in parentheses. If it is a decimal number just enter it as a decimal number. Converting it to a fraction is not going to generate any more precision in the result. You lose precision when you go from fraction to decimal, but you do not make a number more precise by converting it from a decimal representation to a fraction.

It does have a table Mode where you can enter an expression y= F(X) and generate a table of values. If in the expression F(x) a numerical coefficient is a fraction just enter it as a fraction, possibly enclosed in parentheses. If it is a decimal number just enter it as a decimal number. Converting it to a fraction is not going to generate any more precision in the result. You lose precision when you go from fraction to decimal, but you do not make a number more precise by converting it from a decimal representation to a fraction.

Nov 16, 2013 | Casio fx-300ES Calculator

maybe a for loop and a simple correct = variable + 1

Sep 06, 2012 | The PHP Group PHP

This calculator cannot handle matrices that have anyone dimension larger than 3.

How to solve your problem?

use a computer program devoted to solving linear equations

OR buy another calculator that can handle larger systems of equations (a graphing calculator, maybe).

How to solve your problem?

- Set up the problem by hand (pencil paper): use Cramer's rules. Make use of the calculator to perform the various calculation.

- Sacrifice one equation which you will use to eliminate one variable of the 4 by expressing it in terms of the other three. Do the algebra to obtain a system of 3 equations in three unknowns.
- Use the calculator to find the solutions ( the three variables that are left).
- Use the 4th equation (the one you scacrificed) to obtain the value of the 4th unknown.

use a computer program devoted to solving linear equations

OR buy another calculator that can handle larger systems of equations (a graphing calculator, maybe).

Feb 16, 2011 | Casio FX-115ES Scientific Calculator

Double check: either you calculated 32 / ( 6 * 10^(-23) ) by accident, or the displayed result is in fact 5.333333E-23 (note the negative exponent). For example, 1E-3 is to be understood as 0,001.

Jan 09, 2011 | Texas Instruments TI-84 Plus Calculator

You can enter equations of any type. Read the rest of the post. Keep in mind that if you are using the Solve( function X must be the unknown. If you are using the Table computational mode, X is the independent variable and Y the dependent one.

The variables you have at your disposal in this calculator are

A, B,C,D,X,Y,M. All of them are accessed by pressing the [ALPHA] key before the key near which is written the name of the variable. You will notice that the markings of the symbols accessed with the [ALPHA] key are of the same color as that of the [ALPHA] key.

You will notice also that there are two = signs.

The one at the bottom right executes the command line. By pressing it you find the result of the expression just entered.

The other = sign is marked on the body of the calculator with the same color as the [ALPHA] key. It is located at the top left of the keyboard (excluding the row with SHIFT, MODE, the navigation buttons)

Example to enter X^2-2X-35=0 you proceed as follows.

Direct access physical keys are in [ ],

[ALPHA] (X) [X to power 2] [ - ] [2] [ * ][ALPHA][(X) [ - ] [3][5] [ALPHA] (=) [0]

Usually when you enter such an expression it is with the intention of solving it for X. By default X is taken to be the UNKNOWN. You will be prompted to enter the value assigned to any other letter symbol (Y, A,B,C,D).

So, if you want to use the Solve function, you enter the equation you are dealing with, and before pressing anything else, press [SHIFT] [CALC] and the calculator will ask you a question: "Solve for X?" , and you press the = sign at the bottom right.

Then you will be prompted for any other non-X letter. Once all non-X variables (if any) are given values, the calculator will return with the solution. You will see on the screen L-R= (should be zero if you are lucky).

The variables you have at your disposal in this calculator are

A, B,C,D,X,Y,M. All of them are accessed by pressing the [ALPHA] key before the key near which is written the name of the variable. You will notice that the markings of the symbols accessed with the [ALPHA] key are of the same color as that of the [ALPHA] key.

You will notice also that there are two = signs.

The one at the bottom right executes the command line. By pressing it you find the result of the expression just entered.

The other = sign is marked on the body of the calculator with the same color as the [ALPHA] key. It is located at the top left of the keyboard (excluding the row with SHIFT, MODE, the navigation buttons)

Example to enter X^2-2X-35=0 you proceed as follows.

Direct access physical keys are in [ ],

[ALPHA] (X) [X to power 2] [ - ] [2] [ * ][ALPHA][(X) [ - ] [3][5] [ALPHA] (=) [0]

Usually when you enter such an expression it is with the intention of solving it for X. By default X is taken to be the UNKNOWN. You will be prompted to enter the value assigned to any other letter symbol (Y, A,B,C,D).

So, if you want to use the Solve function, you enter the equation you are dealing with, and before pressing anything else, press [SHIFT] [CALC] and the calculator will ask you a question: "Solve for X?" , and you press the = sign at the bottom right.

Then you will be prompted for any other non-X letter. Once all non-X variables (if any) are given values, the calculator will return with the solution. You will see on the screen L-R= (should be zero if you are lucky).

Nov 11, 2010 | Casio FX-115ES Scientific Calculator

Rename your variable (unknown) X, because the calculator takes X as the default unknown. It will ask you "Solve for X?"

the 7, the second minus sign, 3 and 11 use the relevant keys.

For the first minus sign use the negation key or change sign (-)

For the variable X, examine the calculator keys on the row where the parentheses are. To the right corner of the key area there is a symbol in the same color as the ALPHA key. I believe the X is under the right parenthesis, or thereby.

To enter the X variable you press [ALPHA][ )]. To enter the = sign, you press [ALPHA] [CALC].

To execute the solve command, press [SHIFT] [CALC] and you will be prompted " Solve for X?"

the 7, the second minus sign, 3 and 11 use the relevant keys.

For the first minus sign use the negation key or change sign (-)

For the variable X, examine the calculator keys on the row where the parentheses are. To the right corner of the key area there is a symbol in the same color as the ALPHA key. I believe the X is under the right parenthesis, or thereby.

To enter the X variable you press [ALPHA][ )]. To enter the = sign, you press [ALPHA] [CALC].

To execute the solve command, press [SHIFT] [CALC] and you will be prompted " Solve for X?"

May 05, 2010 | Casio FX-115ES Scientific Calculator

Sorry the solution was posted as a clarification request. Here it is at the right place.

Hi,

Left side-Right side = 0 or a very small number.

If the solution cannot be found you will be prompted to change the initial value (your guess) and/or the bounds. Hope it helps.

Hi,

- Turn calculator ON.
- Look for the NumSolve icon.
- Tap the icon.
- The
equation editor screen opens with the word Equation: on one line and a
small rectangle on the next one.
- At the position of the rectangle, type
in the equation.
- Do not forget the right hand side.
- Press [EXE].

- Tap the radio button next to a variable and
enter a value for a parameter.
- Repeat for all known values.
- Last, enter
a guess for the unknown you are solving for and
- set the bounds between which you suspect the solution to be.
- While the radio button for the
unknown is still checked, tap the Solve Menu at the top of the screen,
- select Execute submenu and
- press [EXE].
- Alternatively you can tap the Solve at the left of the toolbar.(see picture).

Left side-Right side = 0 or a very small number.

If the solution cannot be found you will be prompted to change the initial value (your guess) and/or the bounds. Hope it helps.

Nov 27, 2009 | Casio ClassPad 300 Calculator

Hello,

If by variable you mean a litteral symbol (a letter) that can have any value you want, I am sorry to say that you cannot use variables on this calculator: It does not do symbolic algebra.

However, if you really meant how to add a number, that is simple: You enter a number, you press the (+) sign, then enter a second number and press [=]. The result is displayed.

If you have several numbers to add: number1 + number2 +number3+...+ last number =.

Hope it helps

If by variable you mean a litteral symbol (a letter) that can have any value you want, I am sorry to say that you cannot use variables on this calculator: It does not do symbolic algebra.

However, if you really meant how to add a number, that is simple: You enter a number, you press the (+) sign, then enter a second number and press [=]. The result is displayed.

If you have several numbers to add: number1 + number2 +number3+...+ last number =.

Hope it helps

Oct 29, 2009 | Texas Instruments TI-30XA Calculator

You can use a session variable.

First use session_start().

Then you can crate a session variable by simply setting the appropriate member of the $_SESSION or $HTTP_SESSION_VARS (PHP < 4.1.0) array

Example.

session_start();

$_SESSION["number"] = 10 ;

echo $_SESSION["number"];

You can call it whenerver you want.

remmember to start session on all the pages where you use the variable.

First use session_start().

Then you can crate a session variable by simply setting the appropriate member of the $_SESSION or $HTTP_SESSION_VARS (PHP < 4.1.0) array

Example.

session_start();

$_SESSION["number"] = 10 ;

echo $_SESSION["number"];

You can call it whenerver you want.

remmember to start session on all the pages where you use the variable.

Mar 17, 2009 | The PHP Group PHP

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