84=-3x+7(2x+1)

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Solution for 84=-3x+7(2x+1) equation: 



84=-3x+7(2x+1)

We move all terms to the left:

84-(-3x+7(2x+1))=0



We calculate terms in parentheses: -(-3x+7(2x+1)), so:

-3x+7(2x+1)

We multiply parentheses

-3x+14x+7

We add all the numbers together, and all the variables

11x+7

Back to the equation:

-(11x+7)



We get rid of parentheses

-11x-7+84=0

We add all the numbers together, and all the variables

-11x+77=0

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

-11x=-77

x=-77/-11

x=+7

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