Question: What is the solution?

Solve -21*h - 6*h - 838 + 271 = 0 for h.

Answer: -21

Question: What is the solution?

Solve -24*t - 50 - 49 = -99 for t.

Answer: 0

Question: What is the solution?

Solve 142*j - 3555 = 379*j for j.

Answer: -15

Question: What is the solution?

Solve -3*u - 10 = -u for u.

Answer:
-5