-138=-6(6a-7)

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Solution for -138=-6(6a-7) equation: 



-138=-6(6a-7)

We move all terms to the left:

-138-(-6(6a-7))=0



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

-6(6a-7)

We multiply parentheses

-36a+42

Back to the equation:

-(-36a+42)



We get rid of parentheses

36a-42-138=0

We add all the numbers together, and all the variables

36a-180=0

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

36a=180

a=180/36

a=5

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