Question:
Solve -12*r - 205 = -133 for r..

Answer:
-6

Question:
Solve -190*h - 7712 + 95872 = -729*h - 563*h for h..

Answer:
-80

Question:
Solve -20*a = -6376 + 6836 for a..

Answer:
-23

Question:
Solve 4*n + 135 = 31*n for n..

Answer:
5