So you have to solve f / g times -3
Well, it's telling you -3=x so now the equation is f(-3) divided by g(-3)
That just means you plug in -3 to the equations you have, SO:
f(x) = 6(-3) + 8 / g(x)= -3 - 2
f(x) = -18 + 8 / g(x) = -5
f(x) = -10
-10/-5 = 2 , because 2 negatives equals a positive