Q: Solve:
Solve 0 = 330*r - 8022 - 1035 - 1807 - 356 for r.

A: 34

Q: Solve:
Solve -123 = -165*f - 288 for f.

A: -1

Q: Solve:
Solve -840*u = 41568 + 33390 - 13638 for u.

A:
-73