Solve

y=8
-4x-5y=-20

First, substitute y=8 into the second equation:

-4x - 5(8) = -20
-4x - 40 = -20

Add 40 to both sides:

-4x = 20

Divide by -4:

x = -5

So the solution to the system of equations is x = -5 and y = 8.