4x=9+(x+3)

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Solution for 4x=9+(x+3) equation: 



4x=9+(x+3)

We move all terms to the left:

4x-(9+(x+3))=0



We calculate terms in parentheses: -(9+(x+3)), so:

9+(x+3)

determiningTheFunctionDomain
(x+3)+9

We get rid of parentheses

x+3+9

We add all the numbers together, and all the variables

x+12

Back to the equation:

-(x+12)



We get rid of parentheses

4x-x-12=0

We add all the numbers together, and all the variables

3x-12=0

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

3x=12

x=12/3

x=4

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