Write down the solution for this math problem: Solve 22315 - 63013 = 1938*p for p.
answer: -21

Write down the solution for this math problem: Solve -542*b = -543*b - 2 for b.
answer: -2

Write down the solution for this math problem: Solve -4006 = 807*n - 74215 for n.
answer: 87

Write down the solution for this math problem: Solve 5*q = 11*q - 0*q - 72 for q.
answer:
12