Write down the solution for this math problem: Solve 0 = 13*b + 2*b - 45 for b.
answer: 3

Write down the solution for this math problem: Solve 689056 + 750466 = -19453*f for f.
answer: -74

Write down the solution for this math problem: Solve -391*c = -665*c + 3562 for c.
answer: 13

Write down the solution for this math problem: Solve 64*w - 17550 = 108*w + 307*w for w.
answer:
-50