Write down the solution for this math problem: Solve -31*p + 992 - 558 = 0 for p.
answer: 14

Write down the solution for this math problem: Solve 66*h - 34*h - 270*h + 2142 = 0 for h.
answer: 9

Write down the solution for this math problem: Solve 0 = 47*r + 8*r - 220 for r.
answer: 4

Write down the solution for this math problem: Solve -4706*i - 6 = -4700*i for i.
answer:
-1