Question:
Solve 9 = 285*x - 3644 - 2617 for x..

Answer:
22

Question:
Solve -224 = 43*b + 120 for b..

Answer:
-8

Question:
Solve 0 = 10*c + 29*c + 117 for c..

Answer:
-3

Question:
Solve -56*a + 5369 = 4361 for a..

Answer:
18