3=(a+6)

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Solution for 3=(a+6) equation: 



3=(a+6)

We move all terms to the left:

3-((a+6))=0



We calculate terms in parentheses: -((a+6)), so:

(a+6)

We get rid of parentheses

a+6

Back to the equation:

-(a+6)



We get rid of parentheses

-a-6+3=0

We add all the numbers together, and all the variables

-1a-3=0

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

-a=3

a=3/-1

a=-3

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