Question:
Solve -28 = -29*y + y for y..

Answer:
1

Question:
Solve -125*u + 20*u - 315 = 0 for u..

Answer:
-3

Question:
Solve 0 = 146*n - 465 - 2163 for n..

Answer:
18

Question:
Solve -12 = -377*k + 375*k for k..

Answer:
6