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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



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

3(x+7)

We multiply parentheses

3x+21

Back to the equation:

-(3x+21)



We get rid of parentheses

9x-3x-21-9=0

We add all the numbers together, and all the variables

6x-30=0

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

6x=30

x=30/6

x=5

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