Question:
Solve -14*j - 43 = -85 for j..

Answer:
3

Question:
Solve 90*b = 140*b + 500 for b..

Answer:
-10

Question:
Solve 12020 + 30397 = 399*j - 3669*j - 13173 for j..

Answer:
-17

Question:
Solve 0 = 12*o - 6*o + 3 - 69 for o..

Answer:
11