Q: What is the solution?
Solve -54*z - 39*z - 837 = 0 for z.

A: -9

Q: What is the solution?
Solve 0 = -16*w + 17*w + 4 for w.

A: -4

Q: What is the solution?
Solve 0 = 3*l + 8 + 1 for l.

A:
-3