Question

solve for u.
9 + 5u = 7u - 9
u =

Explanation:

Step1: Move variable terms to one - side

Subtract $5u$ from both sides:
$9 + 5u-5u=7u - 9-5u$
$9 = 2u-9$

Step2: Move constant terms to the other side

Add 9 to both sides:
$9 + 9=2u-9 + 9$
$18 = 2u$

Step3: Solve for $u$

Divide both sides by 2:
$\frac{18}{2}=\frac{2u}{2}$
$u = 9$

Answer:

$9$