Q: What is the solution?
Solve -15*f + 142 = 52 for f.

A: 6

Q: What is the solution?
Solve -3307*f + 429 = -3268*f for f.

A: 11

Q: What is the solution?
Solve 0 = -33*j + 19*j + 140 for j.

A:
10