Question:
Solve 3729 = -253*u - 2596 for u..

Answer:
-25

Question:
Solve 23768 - 8976 = 172*i for i..

Answer:
86

Question:
Solve 337*l = -963 + 519 - 1241 for l..

Answer:
-5

Question:
Solve -391*l + 395*l = 28 for l..

Answer:
7