Question:
Solve -5*k + 0 = -20 for k..

Answer:
4

Question:
Solve 10*c + 2946 = 2956 for c..

Answer:
1

Question:
Solve -61*j - 32*j + 252 = -111*j for j..

Answer:
-14

Question:
Solve -25 - 52 = 11*k for k..

Answer:
-7