Question

solve for u.
-9 - 4u = -u
u =
submit

Explanation:

Step1: Add 4u to both sides

$-9 - 4u+4u=-u + 4u$
$-9 = 3u$

Step2: Divide both sides by 3

$\frac{-9}{3}=\frac{3u}{3}$
$u=-3$

Answer:

$-3$