Q: What is the solution?
Solve 0 = 17*d - 2*d - 45 for d.

A: 3

Q: What is the solution?
Solve -187*f + 547*f = 7560 for f.

A: 21

Q: What is the solution?
Solve 133*b = -23*b - 421*b - 81*b - 19740 for b.

A:
-30