Write down the solution for this math problem: Solve 6155*y + 6211*y = 18661*y - 6131*y - 10168 for y.
answer: 62

Write down the solution for this math problem: Solve 146 = -4*z + 162 for z.
answer: 4

Write down the solution for this math problem: Solve -8 - 686 = -111*u + 971 for u.
answer: 15

Write down the solution for this math problem: Solve -5985 = -779*b + 950*b for b.
answer:
-35