Question

[Will Medal] Could someone solve this 3 Variable System for me? I don't understand how to solve them.

Answer 1

You have to undo or reverse each part of the equation.

Answer 2

@Kittenfire Could you solve it? I'm not sure on how to solve them..

Answer 3

Subtract 3x from both sides

3x+2y+z=7

2y+z=7-3x

Then subtract 2y from both sides

2y+z=7-3x

z=7-3x-2y

Then optionally, rearrange the terms

z=7-3x-2y

z=-3x-2y+7

So after solving 3x+2y+z=7 for z, we get z=-3x-2y+7
maybe?

Answer 4

So I isolate the variable for one equation and plug it into the others until all 3 variables are isolated?

Answer 5

I belive so this was an answer to the same question but asked last year

Answer 6

Hi @ltrout