6a+15=3(8+a)

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Solution for 6a+15=3(8+a) equation: 



6a+15=3(8+a)

We move all terms to the left:

6a+15-(3(8+a))=0

We add all the numbers together, and all the variables

6a-(3(a+8))+15=0



We calculate terms in parentheses: -(3(a+8)), so:

3(a+8)

We multiply parentheses

3a+24

Back to the equation:

-(3a+24)



We get rid of parentheses

6a-3a-24+15=0

We add all the numbers together, and all the variables

3a-9=0

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

3a=9

a=9/3

a=3

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