Question about Bagatrix Algebra Solved! 2005 (105101) for PC

7X+2Y=24
8X+2Y=30

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X=3, y=1.5

Posted on Feb 12, 2009

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## Related Questions:

### How do I get this: Twice a number minus a second number is -1. Twice the second number added to three times the first number is 9. Find the two numbers.

Two equations:
x = first number
y = second number
2x - y = -1
y = 1 + 2x
2y + 3x = 9
2(1 + 2x) + 3x = 9
2 + 7x = 9
7x = 7
x = 1
y = 2(1) + 1 = 3

Oct 25, 2016 | Cars & Trucks

### 7x=2y=15 & y=3x+1

There must be an error: one of the = signs in the first set of equalities must be + or - (probably + because = and + share the same key on the keyboard). Please do use words to formulate the question. No one is a mind reader.

Jan 15, 2014 | Televison & Video

### How do I solve for y, 2y + (y-3)=18 - 2 (y+3). with the casio fx-300es? and if I cant whats the calculator that will. thanx

Do you really need a calculator to solve a linear equation?
Let us see how to solve it without a calculator.
Remove the parentheses fronm the second term on the left : y-3
Use the distributive property on the last term on the right side -2y-6
Take the term -3 to the right side, changing its sign in the process (becomes +3)
Take the -2y term to the left making it +2y.
3y +2y=18+3-6 or 5y=15 and the answer is straightforward .

As to your Casio FX300ES, it cannot solve equations because it does not have an EQUATION calculation mode. The Casios FX-115ES and FX-991ES have an Equation Mode. If you use any of the two to solve an equation in one variable (linear, quadratic or other) the unknown is taken to be x by default. You would have to change the name of the variable from y to x.

Sep 08, 2011 | Casio fx-300ES Calculator

### 2x - 4y = 20 4x + 2y = -20

This should start wit X=something and Y=something, sorry I'm not an human algebra calculator....

Jul 29, 2011 | Computers & Internet

### F 'x=x^2+2y^2 f'y=2y(x^2+2y^2) can some one help me to find stationary points for the above function

If those are the partial derivatives, then the stationary point should be (0,0). Because if you set the partial derivatives to zero and solve for x and y then the only solutions are x=0 and y=0.

Feb 10, 2011 | Texas Instruments TI-89 Calculator

### 7x-2y=1 y=3x

And your question is? If you just want to know how to solve this system, you only need to substitute one equation into the other and solve for the remaining unknown.

y=3x (equation 2), so plug it into equation 1

7x-2y=1
7x-2(3x)=1
7x-6x=1
x=1

from equation 2 then, you know y=3x=3

Oct 05, 2010 | Linear (HDMICAT5EXT) Repeater

### 4x+8y=20 -4x+2y=-30

4x+8y=20 || /4
x+2y=5
x=5-2y

-4x+2y=-30 || /2
-2x+y=-15
-2(5-2y)+y=-15
-10+4y+y=-15
5y=-5
y=-1

x=5-2y || y=-1
x=5-2(-1)
x=5+2
x=7

Mar 10, 2009 | Bagatrix Algebra Solved! 2005 (105101) for...

### Solving systems of equations by elimination

Hi joanmae jmeh;

You can add these equations just like you would numbers

3x + 2y = 7
5x - 2y = 1
-----------------------
8x =8
x=1
Now plug x = 1 back into either equation and you can solve for y
Y = 2

When you add the 2 equations together the +2y and the -2y cancel
out

Hope this helps Loringh Please leave a rating for me Thks

Dec 01, 2008 | Bagatrix Algebra Solved! 2005 (105101) for...

### Variables

Hello,
This calculator cannot handle symbolic algebra.
Use the rules to simplify the expressions: Get rid of the parentheses using distributivity od multiplication with respect to addition; group similar terms (terms with x, terms without x).
Hope it helps.

May 07, 2008 | Casio FX-115ES Scientific Calculator

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