Question: What is the solution?

Solve -59*c - 25*c - 70*c + 6488 = -442 for c.

Answer: 45

Question: What is the solution?

Solve 789 = 9*x + 663 for x.

Answer: 14

Question: What is the solution?

Solve -8*d + 478 + 236 = 26*d for d.

Answer: 21

Question: What is the solution?

Solve 0 = -20*u + 142 - 42 for u.

Answer:
5