Q: What is the solution?
Solve -900*l - 720 = -940*l for l.

A: 18

Q: What is the solution?
Solve 291*u + 115 = -991 - 9952 for u.

A: -38

Q: What is the solution?
Solve -6*n = 6311 - 6245 for n.

A:
-11