Question: What is the solution?

Solve -38788*o + 38760*o - 644 = 0 for o.

Answer: -23

Question: What is the solution?

Solve 2181*u = -38856 - 17850 for u.

Answer: -26

Question: What is the solution?

Solve 84*l = 23*l - 27*l - 528 for l.

Answer: -6

Question: What is the solution?

Solve 327*f + 3990 = -261 for f.

Answer:
-13