-57=6(-5-3z)+9

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Solution for -57=6(-5-3z)+9 equation: 



-57=6(-5-3z)+9

We move all terms to the left:

-57-(6(-5-3z)+9)=0

We add all the numbers together, and all the variables

-(6(-3z-5)+9)-57=0



We calculate terms in parentheses: -(6(-3z-5)+9), so:

6(-3z-5)+9

We multiply parentheses

-18z-30+9

We add all the numbers together, and all the variables

-18z-21

Back to the equation:

-(-18z-21)



We get rid of parentheses

18z+21-57=0

We add all the numbers together, and all the variables

18z-36=0

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

18z=36

z=36/18

z=2

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