Question:
Solve 149*f + 22116 = 18540 for f..

Answer:
-24

Question:
Solve -2*o - 11 = -3 for o..

Answer:
-4

Question:
Solve 2*z = 11 - 1 for z..

Answer:
5

Question:
Solve 2458*d + 504 = 2470*d for d..

Answer:
42