Q: Solve:
Solve -99*n + 51*n + 30*n - 902 = -40*n for n.

A: 41

Q: Solve:
Solve 0 = 10*b + 54 - 14 for b.

A: -4

Q: Solve:
Solve -47 - 4 = 17*z for z.

A:
-3