Write down the solution for this math problem: Solve y + 3981 = 19*y + 3621 for y.
answer: 20

Write down the solution for this math problem: Solve z + 5 = 8 for z.
answer: 3

Write down the solution for this math problem: Solve 101*q - 60*q = -287 for q.
answer: -7

Write down the solution for this math problem: Solve 432 = 22*u + 250*u - 112 for u.
answer:
2