-2z=z+9

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Solution for -2z=z+9 equation: 



-2z=z+9

We move all terms to the left:

-2z-(z+9)=0

We get rid of parentheses

-2z-z-9=0

We add all the numbers together, and all the variables

-3z-9=0

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

-3z=9

z=9/-3

z=-3

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