Question:
Solve 13*k = -138 + 171 - 85 for k..

Answer:
-4

Question:
Solve -17*v - 33 - 359 = 32*v for v..

Answer:
-8

Question:
Solve 31 + 9 = 8*c for c..

Answer:
5

Question:
Solve -190*q = 1025 - 75 for q..

Answer:
-5