Question:
Solve -5 + 6 = z for z..

Answer:
1

Question:
Solve 33*u + 11*u = -264 for u..

Answer:
-6

Question:
Solve -18*n - 30*n + 1292 = -86*n for n..

Answer:
-34

Question:
Solve 813*n = 45*n - 217*n - 2955 for n..

Answer:
-3