Question: What is the solution?

Solve -637*l + 663*l + 104 = 0 for l.

Answer: -4

Question: What is the solution?

Solve 0 = 19*c + 24*c + 594 - 78 for c.

Answer: -12

Question: What is the solution?

Solve -27*k - 27 + 405 = 0 for k.

Answer: 14

Question: What is the solution?

Solve 0 = 18*s - 7*s - 14*s - 78 for s.

Answer:
-26