Question:
Solve 242*x - 3835 = -37*x - 487 for x..

Answer:
12

Question:
Solve 11 = -b - 10*b for b..

Answer:
-1

Question:
Solve -48*f = 28*f - 76 for f..

Answer:
1

Question:
Solve -1353*f + 5599 + 7566 = -359*f - 4727 for f..

Answer:
18