Question:
Solve 7 - 3 = -2*y for y..

Answer:
-2

Question:
Solve 6*n - 19*n + 78 = 0 for n..

Answer:
6

Question:
Solve 4*k - 20 = 4 for k..

Answer:
6

Question:
Solve -364*v - 12 = -361*v for v..

Answer:
-4