Please help! Will mark Brainliest!

Answer:
u = -12
Step-by-step explanation:
add -8u and 5u together.
-8u + 5u = -3u
add 7 to both sides.
29 + 7 = 36
-7 + 7 = 0
You now have the following equation:
36 = -3u
Divide both sides by -3.
36/-3 = -12
-3u/-3 = u
u = -12