Question:
Solve 200*k + 409 + 1283 = 492 for k..

Answer:
-6

Question:
Solve 22*c + 10*c - 3483 = 113*c for c..

Answer:
-43

Question:
Solve -48*r = -43*r + 15 for r..

Answer:
-3

Question:
Solve 778 - 866 = 22*k for k..

Answer:
-4