84=4(x+9)

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



84=4(x+9)

We move all terms to the left:

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



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

4(x+9)

We multiply parentheses

4x+36

Back to the equation:

-(4x+36)



We get rid of parentheses

-4x-36+84=0

We add all the numbers together, and all the variables

-4x+48=0

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

-4x=-48

x=-48/-4

x=+12

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