Question:
Solve -5 + 5 = -12*k for k..

Answer:
0

Question:
Solve 0 = 3*f + f + f for f..

Answer:
0

Question:
Solve -15*g = -23896 + 23911 for g..

Answer:
-1

Question:
Solve 29 = 29*j + 145 for j..

Answer:
-4