Question about Texas Instruments TI-30XA Calculator

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Solving a linear equation from TI30XS Multiview

Hello,
I am a senior citizen and have just returned to college. I have the above calculator and am wondering how I can solve an algebra problem with it so I won't have to do it by hand. Let's say the problem is 2(x-4) -5x = -5. Can anyone show me how to do this with the TI calculator above? I sure would appreciate it. I need all the help I can get. I haven't did algebra in 45 years........

Thanks a lot,
Ed

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Hello,
Sorry this calculator cannot solve equations. It does not have the program. It does not know how to do those things. However it can calculate. Before you can use the calculator you must prepare all yourself. When you have solved the problem, you ask the calculator to compute the value of what you found.

Let us clean the equation a bit
2(x-4) -5x=-5
Get rid of the parentheses 2(x-4) becomes 2x-2*4=2x-8 .Put that result where it was in equation
2x-8 -5x=-5
Group together the terms that have x in them 2x-5x=-3x
Then
2x-8-5x=-5, becomes -3x-8=-5
You want to isolate the term with x (have it on one side, and the others on the other side) -3x= -5 -(-8)= -5+8 =3.

The equation becomes
-3x=3 Thus -x=3/3=1 and x=-1.
In general you would have obtained x= (some number/some other number) and that is where the calculator would intervene.

Hope it helps.

Posted on Sep 17, 2009

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