Question:
Solve 54*n = 51*n - 3 for n..

Answer:
-1

Question:
Solve 22*h + 12*h - 68 = 0 for h..

Answer:
2

Question:
Solve 2294*d - 276 = 2290*d for d..

Answer:
69

Question:
Solve -48 = -77*n + 61*n for n..

Answer:
3