Question about Texas Instruments TI-89 Calculator

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Multiple equation solver

The multiple equation solver is no longer on the TI-89, it just disappeared! How can I redownload it to my calculator?

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There are a few routines to solve simultaneous LINEAR equations that are embedded in the Operating system of the calculator.

  1. solve(
  2. Simult(
However if you are looking for the simultaneous equation solver application, you can download it from the TI website. Here is the link

If you need download and install instructions, you will find them here.

Posted on Aug 01, 2010

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1 Answer

How do I graph an equation with TI 89?


Just open the Y= equation editor and enter your equation. Use X for T. Make sure the angle unit is in radians.

Nov 10, 2014 | Texas Instruments TI-89 Calculator

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On the TI83 calculator the equation solver dont workequation solver dont work


Most probable that you are not using the correct syntax.
Press MATH, then scroll down to reach the SOLVER line. Press ENTER. Create the equation, using the ALPHA keyboard to type in letter symbols.
Press ENTER. The screen that opens displays the equation and a list of the variable present in your equation. Each letter (variable) must have a value, except the unknown. If there is a 0 after the = sign on the same line as the unknown, you must clear it so as to leave a blank.
Specify the lower bound and the upper bound to speed up the search.
Once finished press [ALPHA][ENTER] to execute the (SOLVER)

Oct 20, 2011 | Texas Instruments TI-83 Plus Calculator

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Solve for x: x/3-1/5=4/3


Press [math] [0] to put the calculator into equation solver. Then you input your equation in 0 = format. So, the equation x/3 - 1/5 = 4/3 would be input as 0 = x/3 - 1/5 - 4/3 . Then press [enter] .

Apr 05, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

2c + 6 + 7c = 8


To solve this with a ti-84 press [math] and select solve from the menu. This will open the equation solver. Type in your equation
(Note: you may need to put it in the form with 0=, So the equation would be 0 = 2c + 6 +7c - 8 ). Then press
enter or arrow down button.

Mar 30, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

This calculator model ti 85 can to searching equations of cubics?


There is nothing for directly solving cubics, but the general purpose Solver() function can be used for this. For example, given the cubic x^3+x^2=125 with a guess at a root at 4, Solver(x^3+x^2=125,x,4) will produce an answer of about 4.64. Full details are in the manual in the "Equation Solving" chapter.

Feb 22, 2011 | Texas Instruments TI-85 Calculator

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Will the ti83 work simultaneous equation?


Yes. Since there's far too much material for a single post, please refer to the chapter "Matrices" in the Guidebook. If you've misplaced your guidebook, you can download a new one from http://education.ti.com

Apr 28, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

@ symbol


According to the TI-89 Guidebook:

This notation indicates an “arbitrary integer” that represents any integer. When an arbitrary integer occurs multiple times in the same session, each occurrence is numbered consecutively. After it reaches 255, arbitrary integer consecutive numbering restarts at @n0.

Hope this helps. If you need any more info just ask away! :)

Jan 21, 2009 | Texas Instruments TI-89 Calculator

3 Answers

IF I HAVE TWO equations 5x+8y=54, AND -9x+y=26 how do i solve


use the simultaneous equation solver software available on ur ti-89 and enter the equation in the form of augmented matrix and you will get ur answer.

Dec 03, 2008 | Texas Instruments TI-89 Calculator

2 Answers

Solving multiple non-linear equations


Type it like this: solve( equation1 and equation2 and moreEquations, {list of variables to solve for})

Put all of your equations right after the opening parenthesis separated by the word and, then a comma, then within curly braces each variable you want to solve for each separated by a comma.

Apr 26, 2008 | Texas Instruments TI-89 Calculator

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