Question:
Solve 100 = -12*b - 8*b for b..

Answer:
-5

Question:
Solve -31*y + 45 = -141 for y..

Answer:
6

Question:
Solve 279*o - 10760 - 13763 - 15077 = -51*o for o..

Answer:
120

Question:
Solve 43*o - 47*o - 4 = 0 for o..

Answer:
-1