Q: Solve:
Solve 219*f - 648*f = -197*f - 198*f + 646 for f.

A: -19

Q: Solve:
Solve 1056 = -6*q + 1098 for q.

A: 7

Q: Solve:
Solve 4740 = 59*b + 40*b + 9*b + 1284 for b.

A:
32