Question: What is the solution?

Solve 0 = -15*o + 13*o + 6 for o.

Answer: 3

Question: What is the solution?

Solve 0 = -14*i - 0 + 28 for i.

Answer: 2

Question: What is the solution?

Solve 418*b = 110*b - 5236 for b.

Answer: -17

Question: What is the solution?

Solve 20*j + 656 = 4*j - 25*j for j.

Answer:
-16