Write down the solution for this math problem: Solve -15929*n = -15911*n + 90 for n.
answer: -5

Write down the solution for this math problem: Solve -303458*f - 14100 = -302753*f for f.
answer: -20

Write down the solution for this math problem: Solve -4*l = 22 - 18 for l.
answer: -1

Write down the solution for this math problem: Solve -96*z + 702*z - 3684 = -315*z for z.
answer:
4