Q: Solve -2160 = -4641*f - 4623*f + 13927*f - 4636*f for f.

A: -80

Q: Solve c + 84 = 15*c for c.

A: 6

Q: Solve -124688 + 5726 = -2203*x for x.

A: 54

Q: Solve -1389*y + 320 + 14959 = 0 for y.

A:
11