12=3+9(x-12)

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Solution for 12=3+9(x-12) equation: 



12=3+9(x-12)

We move all terms to the left:

12-(3+9(x-12))=0



We calculate terms in parentheses: -(3+9(x-12)), so:

3+9(x-12)

determiningTheFunctionDomain
9(x-12)+3

We multiply parentheses

9x-108+3

We add all the numbers together, and all the variables

9x-105

Back to the equation:

-(9x-105)



We get rid of parentheses

-9x+105+12=0

We add all the numbers together, and all the variables

-9x+117=0

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

-9x=-117

x=-117/-9

x=+13

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