Write down the solution for this math problem: Solve -458*f - 250*f - 201*f + 7272 = 0 for f.
answer: 8

Write down the solution for this math problem: Solve 0 = 63*d - 2673 + 4269 - 2226 for d.
answer: 10

Write down the solution for this math problem: Solve 105*r + 416 = 53*r for r.
answer: -8

Write down the solution for this math problem: Solve 18*q = 10*q for q.
answer:
0