Question:
Solve -2200*n - 2590*n + 328798 = -447*n - 181*n for n..

Answer:
79

Question:
Solve -8*u = -11*u + 37*u for u..

Answer:
0

Question:
Solve -90 = -z - 86 for z..

Answer:
4

Question:
Solve 399*n = 432*n + 825 for n..

Answer:
-25