Question:
Solve 26 - 28 = 2*k for k..

Answer:
-1

Question:
Solve 110*n - 55*n - 91 = 62*n for n..

Answer:
-13

Question:
Solve 15*h + 108 + 66 = 9 for h..

Answer:
-11

Question:
Solve 105*i + 144 = 89*i for i..

Answer:
-9