Question:
Solve -81*n = 28*n + 29*n + 414 for n..

Answer:
-3

Question:
Solve 0 = 10*y - 9*y + 2 for y..

Answer:
-2

Question:
Solve 61*v + 181 = -686 - 109 for v..

Answer:
-16

Question:
Solve 149*f + 22116 = 18540 for f..

Answer:
-24