Question: What is the solution?

Solve 6615 + 835 = 210*y - 11410 + 4370 for y.

Answer: 69

Question: What is the solution?

Solve -15*x - 29*x = 16*x + 1800 for x.

Answer: -30

Question: What is the solution?

Solve 91*r - 441 - 266 - 476 = 0 for r.

Answer: 13

Question: What is the solution?

Solve 231*p + 2498 + 736 = 0 for p.

Answer:
-14