Question:
Solve -20*y - 1953 = -1413 for y..

Answer:
-27

Question:
Solve -81*y = -15*y + 264 for y..

Answer:
-4

Question:
Solve 62*h - 5 = 67*h for h..

Answer:
-1

Question:
Solve 0 = 513*y + 160*y - 7043 - 360 for y..

Answer:
11