Write down the solution for this math problem: Solve 31*p - 13 = 67*p - 37*p for p.
answer: 13

Write down the solution for this math problem: Solve -10065586*y = -10065618*y + 672 for y.
answer: 21

Write down the solution for this math problem: Solve 608 - 5040 - 7799 = 1529*f + 33639 for f.
answer: -30

Write down the solution for this math problem: Solve -3877*w + 54385 = -131711 for w.
answer:
48