Question:
Solve 3049*z = 2219*z - 38979 + 6609 for z..

Answer:
-39

Question:
Solve -1309*n - 2339*n = -120384 for n..

Answer:
33

Question:
Solve 0 = -29*z - 3710 + 3188 for z..

Answer:
-18

Question:
Solve -10*u = 31 - 1 for u..

Answer:
-3