Question:
Solve -55*y = -29*y - 23*y - 42 for y..

Answer:
14

Question:
Solve 101187*u = 100966*u - 5083 for u..

Answer:
-23

Question:
Solve 55*b - 1091 = -321 for b..

Answer:
14

Question:
Solve 66*b - 437 + 765 = -1571 - 1005 for b..

Answer:
-44