Question:
Solve -221*o + 7378 = 49*o + 1708 for o..

Answer:
21

Question:
Solve -5 + 0 = -5*f for f..

Answer:
1

Question:
Solve -4*b + 7*b = -9 for b..

Answer:
-3

Question:
Solve 553*w - 163939 = -148455 for w..

Answer:
28