Q: What is the solution?
Solve 185*s = 542 + 1863 for s.

A: 13

Q: What is the solution?
Solve -8 = -140*c + 142*c for c.

A: -4

Q: What is the solution?
Solve -12*f = -502*f + 1791 - 7671 for f.

A:
-12