3(5+a)=(28+12a)

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Solution for 3(5+a)=(28+12a) equation: 



3(5+a)=(28+12a)

We move all terms to the left:

3(5+a)-((28+12a))=0

We add all the numbers together, and all the variables

3(a+5)-((12a+28))=0

We multiply parentheses

3a-((12a+28))+15=0



We calculate terms in parentheses: -((12a+28)), so:

(12a+28)

We get rid of parentheses

12a+28

Back to the equation:

-(12a+28)



We get rid of parentheses

3a-12a-28+15=0

We add all the numbers together, and all the variables

-9a-13=0

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

-9a=13

a=13/-9

a=-1+4/9

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