3=(x+7)

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Solution for 3=(x+7) equation: 



3=(x+7)

We move all terms to the left:

3-((x+7))=0



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

(x+7)

We get rid of parentheses

x+7

Back to the equation:

-(x+7)



We get rid of parentheses

-x-7+3=0

We add all the numbers together, and all the variables

-1x-4=0

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

-x=4

x=4/-1

x=-4

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