Write down the solution for this math problem: Solve -540*f + 448*f - 35322 = 446*f + 680*f for f.
answer: -29

Write down the solution for this math problem: Solve 20*z - 6911 + 9359 = -14*z for z.
answer: -72

Write down the solution for this math problem: Solve -817*k - 3007*k = -172080 for k.
answer: 45

Write down the solution for this math problem: Solve 53 = -24*s - 67 for s.
answer:
-5