-z-9=-3z+9

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Solution for -z-9=-3z+9 equation: 



-z-9=-3z+9

We move all terms to the left:

-z-9-(-3z+9)=0

We add all the numbers together, and all the variables

-1z-(-3z+9)-9=0

We get rid of parentheses

-1z+3z-9-9=0

We add all the numbers together, and all the variables

2z-18=0

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

2z=18

z=18/2

z=9

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