Question

How do you solve the following system?: `5x-7y=22 , 4x-3y=15`

Answer 1

`x=3` and `y=-1`

Explanation:

`7*(4x-3y)-3*(5x-7y)=15*7-3*22`

`(28x-21y)-(15x-21y)=105-66`

`13x=39`, so `x=3`

`5*3-7y=22`

`15-7y=22`

`-7y=7`, so `y=-1`