Question:
Solve -r + 38 - 38 = 0 for r..

Answer:
0

Question:
Solve 0 = -8*p - 18 + 42 for p..

Answer:
3

Question:
Solve 121*b = 133*b - 84 for b..

Answer:
7

Question:
Solve -995*o + 22532 + 19258 = 0 for o..

Answer:
42