Question:
Solve -264*u - 1260 = -324*u for u..

Answer:
21

Question:
Solve -37*k = 43*k + 800 for k..

Answer:
-10

Question:
Solve -290*m = -100*m + 4750 for m..

Answer:
-25

Question:
Solve -10*z - 123 = 17*z + 14*z for z..

Answer:
-3