Write down the solution for this math problem: Solve 0 = 6*k - 60 + 30 for k.
answer: 5

Write down the solution for this math problem: Solve -146*w = -131*w - 249 + 924 for w.
answer: -45

Write down the solution for this math problem: Solve 0 = 89*x - 166*x - 98*x + 11012 - 2437 for x.
answer: 49

Write down the solution for this math problem: Solve -127*f + 498*f = -132*f - 254*f for f.
answer:
0