Write down the solution for this math problem: Solve -7*p - 5*p = -2*p for p.
answer: 0

Write down the solution for this math problem: Solve -747*p - 287807 + 282578 = 0 for p.
answer: -7

Write down the solution for this math problem: Solve 0 = 80*q - 87*q - 21 for q.
answer: -3

Write down the solution for this math problem: Solve 513*w + 26*w - 16170 = 0 for w.
answer:
30