Question

How do you solve x-2y=-25 and 3x-y=0?

Answer 1

`x=5` and `y=15`

Explanation:

As `3x-y=0`, we have `y=3x`

hence `x-2y=-25` becomes

`x-2*3x=-25`

or `x-6x=-25`

or `-5x=-25`

i.e. `x=(-25)/(-5)=25/5=5`

and `y=3*5=15`