Question:
Solve -10266*b = -10297*b + 558 for b..

Answer:
18

Question:
Solve -73*o + 331 = -347 - 198 for o..

Answer:
12

Question:
Solve 138 = 128*b - 161*b + 336 for b..

Answer:
6

Question:
Solve -1762*c = 71209 - 20111 for c..

Answer:
-29