Question:
Solve -488 = 16*d - 77*d for d..

Answer:
8

Question:
Solve -13329*b = -13322*b - 49 for b..

Answer:
7

Question:
Solve -83 = 40*a + 237 for a..

Answer:
-8

Question:
Solve 6*l + 198 = 162 for l..

Answer:
-6