Solve the system of equations x+4y=15 2x-y=-15

x+4y=15 2x-y=-15

We have to make x neg.

-2 (x) + 4y (-2) = - 2 (15)

-2x-8y=-30

2x-y=-15

-9y = - 45

Solve for y

Y=-45/-9

Y = 5

Substitute your y answer into one original equation to find x.

x+4y=15

X+4 (5) = 15

X+20=15

X=15-20

X = - 5

Answer is (-5,5)