Question:
Solve -138*f + 21*f + 564 = -70*f for f..

Answer:
12

Question:
Solve 95 = g + 90 for g..

Answer:
5

Question:
Solve 35*l - 3*l = -590 + 782 for l..

Answer:
6

Question:
Solve -4*z - 40 = 11 - 15 for z..

Answer:
-9