Question:
Solve -614*a = -612*a - 10 for a..

Answer:
5

Question:
Solve -19672 = 178*h - 11484 for h..

Answer:
-46

Question:
Solve 119*a - 732 = 113*a - 271*a + 376 for a..

Answer:
4

Question:
Solve -313 + 411 = 41*r - 599 for r..

Answer:
17