Q: Solve 0 = 10*f - 35*f - 150 for f.

A: -6

Q: Solve 1517*c - 763*c = 770*c + 16 for c.

A: -1

Q: Solve -375*t = 130*t + 457*t + 28860 for t.

A: -30

Q: Solve -12*d - 32 = -68 for d.

A:
3