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TI-83 Plus and equations with variables?

Hummer

Hummer

macrumors 65816
Original poster
Does anyone know how I can use my TI-83 Calc to solve problems that have variables in them. Is it possible? I've noticed that the calc has the alpha key, but whenever I add letters into the problem I get an error.
 
In a word, no

I am not really sure if it can be had with aftermarket programming, but the TI83 cannot solve equations out of the box. The alphanumeric key is used for programming or storing numbers as letters (and maybe also words).

I am not sure between the TI83+ and the TI89, but I have used the TI89 and know that it can solve for variables.

Hope this helps.
 
The TI-83 or TI-83 Plus or TI-84(I think) cannot solve equations. Only the 86 and higher. If you really need to know a way to solve them make the equation equal to zero then graph the equation on y1 and on y2 graph zero then find the intersection point. That should give you the answer.

The reason you get the error is becuase the variable you put in is undefined
 
The TI-83 Plus definitely has a solver function. Just check under Math. It's the last option.

It isn't particularly good, but it's there.
 
well it doesn't have one built in already, but with a program and an application or 2 it can. i use several applications in a program i made that solves equations for 1 or 2 solutions (real only) and it simplifies expressions with any amount of variables and puts it an easy way to read. it needs symbolic and prettyprint applications to work (i didn't make these) and i also recommend omnicalc too. email me if you need any help or if you want the program or applications. (takeyourpills55@aol.com)
 
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