Write down the solution for this math problem: Solve 846 = 124*b - 270 for b.
answer: 9

Write down the solution for this math problem: Solve -6168*c - 2167*c + 248473 + 29981 = 4322*c for c.
answer: 22

Write down the solution for this math problem: Solve 4 + 287 + 108 = 21*r for r.
answer: 19

Write down the solution for this math problem: Solve -32*b + 101*b - 566 = -2153 for b.
answer:
-23