Question:
Solve 216*z = -47*z - 610*z + 7857 for z..

Answer:
9

Question:
Solve -11*s - 20 = 9*s for s..

Answer:
-1

Question:
Solve z + 333 - 336 = 0 for z..

Answer:
3

Question:
Solve 156 = 29*h - 41*h for h..

Answer:
-13