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

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



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

We move all terms to the left:

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



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

2x+3(-3x-7)

We multiply parentheses

2x-9x-21

We add all the numbers together, and all the variables

-7x-21

Back to the equation:

-(-7x-21)



We get rid of parentheses

7x+21-84=0

We add all the numbers together, and all the variables

7x-63=0

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

7x=63

x=63/7

x=9

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