Q: Solve 104*l - 20*l + 168 = 0 for l.

A: -2

Q: Solve 16 = 18*m + 52 for m.

A: -2

Q: Solve -6*m - 21*m + 45 = 18*m for m.

A: 1

Q: Solve 5602*x + 0 - 1 = 5601*x - 4 for x.

A:
-3