You have the following expression for the function h(x):
[tex]h(x)=5x+8[/tex]Moreover, you have:
[tex]h(x)=-12[/tex]To determine the value of x that makes h(x) = -12, equal the previous result to the expression for h(x) and solve for x, just as follow:
5x + 8 = -12 subtract 8 both sides
5x = -12 - 8 simplify right side
5x = -20 divide by 5 both sides
x = -20/5
x = -4
Hence, x = -4 makes that h(x) = -12
