Question:
Solve -31*s + 69 = -8*s for s..

Answer:
3

Question:
Solve 625*o - 7166 = 12145 - 4936 for o..

Answer:
23

Question:
Solve 171*d - 183*d = -48 for d..

Answer:
4

Question:
Solve -30817 - 129309 = 3481*s for s..

Answer:
-46