(x-u)/3=5-y

Question

what does "u" equal?

Answer 1

(x - u )/3 = 5 - y
multiply both sides by 3
(x - u ) = 3(5 - y)
(x - u) = 15 - 3y
- u = 15 - 3y - x
u = -15 + 3y + x