Write down the solution for this math problem: Solve 133*f = 80*f + 82*f - 145 for f.
answer: 5

Write down the solution for this math problem: Solve 21*k - 443 = -4*k - 168 for k.
answer: 11

Write down the solution for this math problem: Solve 50*i = 763215 - 761765 for i.
answer: 29

Write down the solution for this math problem: Solve 108 = 7*l - 34*l for l.
answer:
-4