Question:
Solve 13*l = 12*l + 4 for l..

Answer:
4

Question:
Solve 29 = -22*i + 139 for i..

Answer:
5

Question:
Solve -50453 = -2633*h + 75199 + 56025 for h..

Answer:
69

Question:
Solve 3*d + 7 + 2 = 0 for d..

Answer:
-3