Question:
Solve 80 = 91*n - 466 for n..

Answer:
6

Question:
Solve -35 = -5*a - 10 for a..

Answer:
5

Question:
Solve -169 = -74*x + 127 for x..

Answer:
4

Question:
Solve 120*v + 156*v = -113*v - 2459 + 125 for v..

Answer:
-6