Q: What is the solution?
Solve 0 = -q - 20*q - 42 for q.

A: -2

Q: What is the solution?
Solve -741*k - 12798 = -251*k + 3862 for k.

A: -34

Q: What is the solution?
Solve 0 = 8*z - 388 + 412 for z.

A:
-3