Algebra program

[Columbine]

Ok, what I want to do is create a program that will solve my equations for me. I have looked on some information, but nothing was helping me. I made one that will let me input my own 'x' and 'y' s and it tells me if its right or not.. but I want it to solve it on its own like for example ...

2x = y + 1
2x - y = 5

Could someone please help me?

[ganeshmoorthy]

i dont know algebra...if you solve it here in your steps then we can convert that into vb codes

[penagate]

An algebra parser would be quite entertaining.

I suggest you start with single equations (simultaneous equations can come later). First try splitting the equation into the left hand and right hand side expressions.

User input: 2x = 5

LHS: 2x
RHS: 5

You already have x on one side so what you need to do is get it down to 1x:

LHS = x
RHS = 5/2 = 2.5

Result: x = 2.5

The tricky part is the string manipulation you need to do to get there. But if you start with some simple equations and work through the mental process you would take to get the result, see if you can apply that in code.

[da_silvy]

You can also use matrices to solve simultaneous equations quite easily... When you get up to that stage

[Columbine]

I thank you guys for the help, but its not helping me too much. :-/ I dunno how to insert that into code. I know some vb, not enough to do this on my own though. Anyone mind helping? And Penagate you forgot the 'y' :P

[Columbine]

I tried all day, and still havent figured it out. Please help.

[Kanbei]

1st: its possible to do what you want from the beggining. but maybe its easier if you have 2 textboxes and in the middle like a combobox from which the user can choose =, >, <, >= or <= ......

anyways: post EXACTLY the way you would like the user to input information and EXACTLY the kind and complex level of equations you want this prog to handle... at least in its 1st stage

cause its a long code to write for the realizing you want something else

also there was another topic similar to this... ill make a search and post the link (it wasnt exactly the same though)

[Kanbei]

HERE
http://www.vbforums.com/showthread.p...ighlight=equal

though not the same... you amy find some usefull info

[jcis]

I tried all day, and still havent figured it out. Please help.

If you want to get the value of X, then 1 equation is enough (without Y), but if you want to get X and Y you need to supply 2 equations, but these from your first post look impossible to be True..

2x = y + 1  '--> then 2x - y = 1
2x - y = 5

1<>5 so both equations are not related, so you CAN'T get X and Y values from there.

[Columbine]

Jcis... thats the EXACT question in the book... so I know there is an answer, just dont know what it is.

[Harsh Gupta]

Jcis... thats the EXACT question in the book... so I know there is an answer, just dont know what it is.

jcis is right, but if you think the equations are right, then please post the whole question from the book as it is. probably then we may help you.

Harsh

[Columbine]

That is the WHOLE question, you have to find out what x and y is.. but they have to be the same in both equations.

[jcis]

That is the WHOLE question, you have to find out what x and y is.. but they have to be the same in both equations.

Ok, but both equations must be related each other, not like the example in your first post, example:

2x = y + 1
2x - y = 1

Having that now the program should be able to find out that X=2 and Y=3
Is that what you want?

[Columbine]

Yes, thats the answer, but how would i make a program to find the answers? And thanks for being so patient.

[Hack]

Moved to Math Forum