Step-by-step explanation:
12 - 2u = 9u + 45
-2u - 9u = 45 -12
-11u = 33 we'll cut 33 by 11 in 3 times
u = -3 answer
Answer:
u = -3
12 - 2u + 2u = 9u + 2u + 45
12 = 11u + 45
12 - 45 = 11u + 45 - 45
-33 = 11u
-33/11 = u
-3 = u
Check:
12 - 2(-3) = 9(-3) + 45
12 + 6 = -27 + 45 = 18
