-2(-9-3z)=12

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Solution for -2(-9-3z)=12 equation: 



-2(-9-3z)=12

We move all terms to the left:

-2(-9-3z)-(12)=0

We add all the numbers together, and all the variables

-2(-3z-9)-12=0

We multiply parentheses

6z+18-12=0

We add all the numbers together, and all the variables

6z+6=0

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

6z=-6

z=-6/6

z=-1

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