Question: What is the solution?

Solve 0 = 2*u - 112*u - 660 for u.

Answer: -6

Question: What is the solution?

Solve 0 = 920*z - 880*z - 280 for z.

Answer: 7

Question: What is the solution?

Solve 3*b - 247 + 262 = 0 for b.

Answer: -5

Question: What is the solution?

Solve -188 = -13*l - 214 for l.

Answer:
-2