Write down the solution for this math problem: Solve 55*b + 351*b - 8526 = 0 for b.
answer: 21

Write down the solution for this math problem: Solve -5*k + 79 = -38*k - 46*k for k.
answer: -1

Write down the solution for this math problem: Solve 89*r = 48*r - 410 for r.
answer: -10

Write down the solution for this math problem: Solve -7*m + 5*m + 8 = 0 for m.
answer:
4