Write down the solution for this math problem: Solve 6401 = -11*f + 6346 for f.
answer: -5

Write down the solution for this math problem: Solve 128*x - 25 = 133*x for x.
answer: -5

Write down the solution for this math problem: Solve 5172 - 12761 + 2241 = -71*a - 1159 for a.
answer: 59

Write down the solution for this math problem: Solve -4 + 0 = m for m.
answer:
-4