Question: What is the solution?

Solve 13*r + 945 = 127*r - 2019 for r.

Answer: 26

Question: What is the solution?

Solve 0 = 1295*b - 257*b - 648*b + 25740 for b.

Answer: -66

Question: What is the solution?

Solve 536*y - 4164 - 4174 = -498*y + 968 for y.

Answer: 9

Question: What is the solution?

Solve -806*o + 373*o + 1260 = -397*o for o.

Answer:
35