Question:
Solve 0 = -142*u + 17*u - 750 for u..

Answer:
-6

Question:
Solve 24121 = -1085*l - 42006 + 8963 - 16616 for l..

Answer:
-68

Question:
Solve 0*s - 8*s = -32 for s..

Answer:
4

Question:
Solve 13891*u - 13824*u = 2814 for u..

Answer:
42