Q: Solve -7752*f = -7749*f - 27 for f.

A: 9

Q: Solve -1711*r = -1720*r + 72 for r.

A: 8

Q: Solve -247*f - 325*f - 3684 = -74*f + 2292 for f.

A: -12

Q: Solve -116*o = -119*o - 27 for o.

A:
-9