Q: Solve:
Solve 47*r + 391 - 592 = 10*r + 2093 for r.

A: 62

Q: Solve:
Solve -r - 17*r + 144 = 0 for r.

A: 8

Q: Solve:
Solve 4*f + 14 = 6 for f.

A:
-2