Question:
Solve 17*z - 109 = 27 for z..

Answer:
8

Question:
Solve -8*x = -4*x + 12 for x..

Answer:
-3

Question:
Solve -36*o - 17 - 91 = 0 for o..

Answer:
-3

Question:
Solve 25425*x = 25419*x + 42 for x..

Answer:
7