Question:
Solve -139 - 39 = 26*m + 108 for m..

Answer:
-11

Question:
Solve 168*d - 135*d - 4872 = -170*d for d..

Answer:
24

Question:
Solve 35*o + 25*o + 106*o = 166 for o..

Answer:
1

Question:
Solve 15 = -c + 10 for c..

Answer:
-5