# Solving a simple equation

1. Apr 15, 2008

### 2Xist

Hi everybody,

i was using the " Solve( " function in TI-89 TIT (home) and i inserted the function (* THIS IS EXACTLY WHAT I TYPED IN *) :::::

solve(20=X(2),X)

i mean.. it should be 10 right?
but like it came up with the " memory error"

* I DID RESET MEMORY AND TRIED REINSTALLING OS <--lol
but none worked...

PLEASE TRY ON YOUR OWN CALCULATORS AND PLEASE HELP!!!!!!!

AGAIN PLEASE POST YOUR OWN RESULTS AFTER TRYING THE SAME EXACT EQUATION!!!

2. Apr 15, 2008

### The|M|onster

the problem is with your input. Try:

solve(20 = 2*x,x) and it should work just fine.

3. Apr 15, 2008

### 2Xist

lol it worked !
thank you so much! lol
so was it just my calculator or did it happen to yours too??
i dont know know why i cant put X(2) when the brackets means multiplication as well...

4. Apr 15, 2008

### The|M|onster

I received the error as well. When you enter x(2) the 89 thinks that you are treating x as a function of a variable when that variable is equal to the value 2, but you have not defined the function x. That is why you received the error. The TI-89 is a very smart calculator, so you have to be especially conscious of how you input.

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