Question:
Solve -39*l = -42*l - 12 for l..

Answer:
-4

Question:
Solve 5987*c = 2*c - 933*c - 124524 for c..

Answer:
-18

Question:
Solve 41*j = 159*j - 1062 for j..

Answer:
9

Question:
Solve -1120 = 93*d - 1492 for d..

Answer:
4