345=x+(x+9)

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Solution for 345=x+(x+9) equation: 



345=x+(x+9)

We move all terms to the left:

345-(x+(x+9))=0



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

x+(x+9)

We get rid of parentheses

x+x+9

We add all the numbers together, and all the variables

2x+9

Back to the equation:

-(2x+9)



We get rid of parentheses

-2x-9+345=0

We add all the numbers together, and all the variables

-2x+336=0

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

-2x=-336

x=-336/-2

x=+168

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