Answer: u = 8
Step-by-step explanation:
We need to get the variable by itself first. In this case the variable is u.
u is really just mutliplied by -4, (-4 x u). In this situation, the opposite of  multiplication is division. So, we need to divide -4u by -4 on each side.
-32 = -4u
-32/-4 = -4u/-4
8 = u
u = 8
