-9=-6x+3(x+7)

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Solution for -9=-6x+3(x+7) equation: 



-9=-6x+3(x+7)

We move all terms to the left:

-9-(-6x+3(x+7))=0



We calculate terms in parentheses: -(-6x+3(x+7)), so:

-6x+3(x+7)

We multiply parentheses

-6x+3x+21

We add all the numbers together, and all the variables

-3x+21

Back to the equation:

-(-3x+21)



We get rid of parentheses

3x-21-9=0

We add all the numbers together, and all the variables

3x-30=0

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

3x=30

x=30/3

x=10

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