Question:
Solve 317*z - 242 = 328*z for z..

Answer:
-22

Question:
Solve -15*u = -21*u + 12 for u..

Answer:
2

Question:
Solve 2*m = -137*m + 18*m - 4719 for m..

Answer:
-39

Question:
Solve -49*o + 56*o - 28 = 0 for o..

Answer:
4