Question:
Solve 19*k - 22*k = -12 for k..

Answer:
4

Question:
Solve 0 = 7*h + 40 - 5 for h..

Answer:
-5

Question:
Solve 0 = -2351*i - 93*i + 183*i - 151487 for i..

Answer:
-67

Question:
Solve 0 = -29*f + 8*f - 42 for f..

Answer:
-2