-11+57=-2(4a+9)

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Solution for -11+57=-2(4a+9) equation: 



-11+57=-2(4a+9)

We move all terms to the left:

-11+57-(-2(4a+9))=0

We add all the numbers together, and all the variables

-(-2(4a+9))+46=0



We calculate terms in parentheses: -(-2(4a+9)), so:

-2(4a+9)

We multiply parentheses

-8a-18

Back to the equation:

-(-8a-18)



We get rid of parentheses

8a+18+46=0

We add all the numbers together, and all the variables

8a+64=0

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

8a=-64

a=-64/8

a=-8

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