3a=(a+12)

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Solution for 3a=(a+12) equation: 



3a=(a+12)

We move all terms to the left:

3a-((a+12))=0



We calculate terms in parentheses: -((a+12)), so:

(a+12)

We get rid of parentheses

a+12

Back to the equation:

-(a+12)



We get rid of parentheses

3a-a-12=0

We add all the numbers together, and all the variables

2a-12=0

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

2a=12

a=12/2

a=6

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