Write down the solution for this math problem: Solve -187*f - 72947 = -63223 for f.
answer: -52

Write down the solution for this math problem: Solve -3600*i + 81508 = -689*i for i.
answer: 28

Write down the solution for this math problem: Solve -38 = 11*k + 33 + 28 for k.
answer: -9

Write down the solution for this math problem: Solve 0 = -9*l + 4 - 40 for l.
answer:
-4