Question: What is the solution?

Solve -20*l = -24*l - 12 for l.

Answer: -3

Question: What is the solution?

Solve -38*w = -27*w + 91*w - 5100 for w.

Answer: 50

Question: What is the solution?

Solve 166*z - 1886*z = -26670 + 33241 - 214691 for z.

Answer: 121

Question: What is the solution?

Solve -502 = -21*w - 649 for w.

Answer:
-7