Question:
Solve 17*t = 21*t + 16 for t..

Answer:
-4

Question:
Solve 0 = -60*h - 1801 + 4693 - 958 - 254 for h..

Answer:
28

Question:
Solve 43*y = -35*y - 312 for y..

Answer:
-4

Question:
Solve -4 = 9*x - 10*x for x..

Answer:
4