Write down the solution for this math problem: Solve 509*z - 5258 = 31*z for z.
answer: 11

Write down the solution for this math problem: Solve 70113*m - 69852*m + 283 = 8863 + 5514 for m.
answer: 54

Write down the solution for this math problem: Solve -438 - 714 = 67*x + 523 for x.
answer: -25

Write down the solution for this math problem: Solve 417 = -40*b - 63 for b.
answer:
-12