2a+9=1+3(2+a)

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Solution for 2a+9=1+3(2+a) equation: 



2a+9=1+3(2+a)

We move all terms to the left:

2a+9-(1+3(2+a))=0

We add all the numbers together, and all the variables

2a-(1+3(a+2))+9=0



We calculate terms in parentheses: -(1+3(a+2)), so:

1+3(a+2)

determiningTheFunctionDomain
3(a+2)+1

We multiply parentheses

3a+6+1

We add all the numbers together, and all the variables

3a+7

Back to the equation:

-(3a+7)



We get rid of parentheses

2a-3a-7+9=0

We add all the numbers together, and all the variables

-1a+2=0

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

-a=-2

a=-2/-1

a=+2

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