-7=-z/3

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Solution for -7=-z/3 equation: 



-7=-z/3

We move all terms to the left:

-7-(-z/3)=0

We get rid of parentheses

z/3-7=0

We multiply all the terms by the denominator


z-7*3=0

We add all the numbers together, and all the variables

z-21=0

We move all terms containing z to the left, all other terms to the right

z=21

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