-84=7(6+3x)

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Solution for -84=7(6+3x) equation: 



-84=7(6+3x)

We move all terms to the left:

-84-(7(6+3x))=0

We add all the numbers together, and all the variables

-(7(3x+6))-84=0



We calculate terms in parentheses: -(7(3x+6)), so:

7(3x+6)

We multiply parentheses

21x+42

Back to the equation:

-(21x+42)



We get rid of parentheses

-21x-42-84=0

We add all the numbers together, and all the variables

-21x-126=0

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

-21x=126

x=126/-21

x=-6

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