Question:
Solve 28*w - 673 + 544 = 71*w for w..

Answer:
-3

Question:
Solve 0 = -0*k + 9*k + 9 for k..

Answer:
-1

Question:
Solve -23 + 13 = 10*d for d..

Answer:
-1

Question:
Solve 476*c + 108*c - 37868 = -2244 for c..

Answer:
61