Question: What is the solution?

Solve 9 + 11 = 5*p for p.

Answer: 4

Question: What is the solution?

Solve 58*r + 36 = 46*r for r.

Answer: -3

Question: What is the solution?

Solve -11*r - 20 = -7*r for r.

Answer: -5

Question: What is the solution?

Solve 166*y = 1439 - 25 + 412 for y.

Answer:
11