Question:
Solve -694*c + 684*c = 20 for c..

Answer:
-2

Question:
Solve -140 - 40 = 30*a for a..

Answer:
-6

Question:
Solve 466 = -303*i + 8647 for i..

Answer:
27

Question:
Solve 651*q + 314*q + 42189 = 104*q for q..

Answer:
-49