Question:
Solve 319*h = 374*h - 550 for h..

Answer:
10

Question:
Solve -33*a = 2*a - 245 for a..

Answer:
7

Question:
Solve 0 = 69*o - 64*o - 15 for o..

Answer:
3

Question:
Solve 219 = -22*t + 21 for t..

Answer:
-9