Q: Solve 0 = 646*r + 456*r + 39*r + 68460 for r.

A: -60

Q: Solve -1513*c - 49554 - 14549 = 8521 for c.

A: -48

Q: Solve -629 - 578 = 71*f for f.

A: -17

Q: Solve -2625*p + 49745 = -72006 - 2074 + 29325 for p.

A:
36