Question:
Solve 12*a - 17*a = 49*a + 648 for a..

Answer:
-12

Question:
Solve 1259*q = 763*q - 1581*q + 43617 for q..

Answer:
21

Question:
Solve 28*h - 79 = 89 for h..

Answer:
6

Question:
Solve -19*o = -17*o + 6 for o..

Answer:
-3