Question

How do I solve this by elimination?
4x + 10y = -12
-4X - 7Y = 0

Answer 1

`x=7, y=-4`

Explanation:

`(4x+10y)+(-4x-7y)=-12+0 \implies 3y=-12 \implies y=-4 \\ \\ 4x+10(-4)=-12 \implies x=7 \\ \\ \therefore x=7, y=-4`