Question:
Solve -148335 = -668*f - 1037*f for f..

Answer:
87

Question:
Solve 7*k - 211 = -204 for k..

Answer:
1

Question:
Solve 0 = -1123*r + 1104*r + 95 for r..

Answer:
5

Question:
Solve 0 = -3*k + 11*k + 24 for k..

Answer:
-3