Question:
Solve -5*z = -3*z + 8 for z..

Answer:
-4

Question:
Solve 4*g + 5 = 1 for g..

Answer:
-1

Question:
Solve 389*j + 36 = 371*j for j..

Answer:
-2

Question:
Solve 392 - 413 = -7*n for n..

Answer:
3