Question: What is the solution?

Solve -285*u + 33*u - 128*u + 15960 = 0 for u.

Answer: 42

Question: What is the solution?

Solve -12*i - 7*i = 111 + 22 for i.

Answer: -7

Question: What is the solution?

Solve 49*p - 559 = 359 + 635 - 328 for p.

Answer: 25

Question: What is the solution?

Solve 110*c - 454*c + 5990 - 21850 = 266*c for c.

Answer:
-26