Question:
Solve 0 = -412*a - 6453 - 11369 - 5662 for a..

Answer:
-57

Question:
Solve 11308*a - 13275*a + 40746 + 85142 = 0 for a..

Answer:
64

Question:
Solve -296 = 66*k - 1418 for k..

Answer:
17

Question:
Solve 6 - 9 = -3*b for b..

Answer:
1