Question

-5x - 2y = 13
-4x + y = 0
Solve by substation

Answer 1

(x,y)=(-1,-4)

Explanation:

-4x + y = 0

+4x +4x

y=4x

-5x - 2y = 13

+5x +5x

-2y = 5x+13

-2(4x) = 5x+13

-8x=5x+13

-5x -5x

-13x/-13=13/-13

x=-1

Thus:

y=4x

y=4(-1)

y=-4