Question

If (x, -4) is a solution to the equation 4x-5y=8, what is the value of x?

Answer 1

x=-3

Explanation:

4x-5y=8

Substitute the value -4 in for y

4x -5(-4) = 8

4x +20 = 8

Subtract 20 from each side

4x+20-20 = 8-20

4x = -12

Divide each side by 4

4x/4 = -12/4

x = -3