Q: What is the solution?
Solve -236 = 2*r - 38*r - 272 for r.

A: -1

Q: What is the solution?
Solve -1617*l + 3 = -1620*l for l.

A: -1

Q: What is the solution?
Solve 116*z = 67*z - 686 for z.

A:
-14