Question: What is the solution?

Solve -42*c = 8*c for c.

Answer: 0

Question: What is the solution?

Solve -1300*b + 2941 = -1127*b for b.

Answer: 17

Question: What is the solution?

Solve 9 = -62*l - 273 - 338 for l.

Answer: -10

Question: What is the solution?

Solve 15*k = 14*k - 40*k - 164 for k.

Answer:
-4