139=7a+6(a+8)

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Solution for 139=7a+6(a+8) equation: 



139=7a+6(a+8)

We move all terms to the left:

139-(7a+6(a+8))=0



We calculate terms in parentheses: -(7a+6(a+8)), so:

7a+6(a+8)

We multiply parentheses

7a+6a+48

We add all the numbers together, and all the variables

13a+48

Back to the equation:

-(13a+48)



We get rid of parentheses

-13a-48+139=0

We add all the numbers together, and all the variables

-13a+91=0

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

-13a=-91

a=-91/-13

a=+7

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