Q: Solve:
Solve 2*s - 12 = 5*s - 2*s for s.

A: -12

Q: Solve:
Solve 4*r - 24 - 8 = 0 for r.

A: 8

Q: Solve:
Solve 3*f + 9 = 4 - 25 for f.

A:
-10