Question: What is the solution?

Solve 118 = p + 130 for p.

Answer: -12

Question: What is the solution?

Solve -87*r + 208*r - 103*r = -1440 for r.

Answer: -80

Question: What is the solution?

Solve -8 = -4*b + 4 for b.

Answer: 3

Question: What is the solution?

Solve -18912*r + 18911*r + 14 = 0 for r.

Answer:
14