Q: What is the solution?
Solve -l - 4*l = 15 for l.

A: -3

Q: What is the solution?
Solve -4*h = -30*h - 156 for h.

A: -6

Q: What is the solution?
Solve -68*k = -113*k - 30*k - 122*k - 6501 for k.

A:
-33