SOLUTION: how do u cancel variable, in a 3 variable equation,that is -6z on top and 0z on bottom

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Question 347013: how do u cancel variable, in a 3 variable equation,that is -6z on top and 0z on bottom
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
division by zero is not allowed.
The variable is undefined.
.
Ed