7-7a=-7(-1-7a)

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Solution for 7-7a=-7(-1-7a) equation: 



7-7a=-7(-1-7a)

We move all terms to the left:

7-7a-(-7(-1-7a))=0

We add all the numbers together, and all the variables

-7a-(-7(-7a-1))+7=0



We calculate terms in parentheses: -(-7(-7a-1)), so:

-7(-7a-1)

We multiply parentheses

49a+7

Back to the equation:

-(49a+7)



We get rid of parentheses

-7a-49a-7+7=0

We add all the numbers together, and all the variables

-56a=0

a=0/-56

a=0

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