Question:
Solve 0 = -144*l + 4114659 - 4117539 for l..

Answer:
-20

Question:
Solve 0 = -27*n + 25*n + 2 for n..

Answer:
1

Question:
Solve 466*f - 855*f - 1666 = -438*f for f..

Answer:
34

Question:
Solve 1860 = -15*u + 1920 for u..

Answer:
4