Q: Solve 16705*f = 16689*f + 176 for f.

A: 11

Q: Solve 13554*d - 878085 = -1851*d for d.

A: 57

Q: Solve 249*q = 235*q - 70 for q.

A: -5

Q: Solve -35*r + 130*r - 9632 = 131*r + 76*r for r.

A:
-86