Q: Solve:
Solve 78 = -681*l + 675*l for l.

A: -13

Q: Solve:
Solve -10*f = 8*f - 24*f + 42 for f.

A: 7

Q: Solve:
Solve 1475 - 6544 = 279*q + 5600 + 1328 for q.

A:
-43