84=x+(4x+9)

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Solution for 84=x+(4x+9) equation: 



84=x+(4x+9)

We move all terms to the left:

84-(x+(4x+9))=0



We calculate terms in parentheses: -(x+(4x+9)), so:

x+(4x+9)

We get rid of parentheses

x+4x+9

We add all the numbers together, and all the variables

5x+9

Back to the equation:

-(5x+9)



We get rid of parentheses

-5x-9+84=0

We add all the numbers together, and all the variables

-5x+75=0

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

-5x=-75

x=-75/-5

x=+15

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