Q: Solve:
Solve -8*f = -15*f - 14 for f.

A: -2

Q: Solve:
Solve -260 = 12026*r - 11931*r + 1735 for r.

A: -21

Q: Solve:
Solve -2140*q = -3813*q + 66920 for q.

A:
40