Question:
Solve -10*z = -3*z + 7 for z..

Answer:
-1

Question:
Solve -4*v + 61 = 45 for v..

Answer:
4

Question:
Solve 119*h - 730 + 16 = 0 for h..

Answer:
6

Question:
Solve -7357 + 7289 = -a for a..

Answer:
68