Question:
Solve 16*x - 21*x - 15 = 0 for x..

Answer:
-3

Question:
Solve 9003*n = 9236*n + 1631 for n..

Answer:
-7

Question:
Solve 70 = -14*z + 24*z for z..

Answer:
7

Question:
Solve 48714*h - 49579*h - 2595 = 0 for h..

Answer:
-3