-21=3(x-8)-6x

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Solution for -21=3(x-8)-6x equation: 



-21=3(x-8)-6x

We move all terms to the left:

-21-(3(x-8)-6x)=0



We calculate terms in parentheses: -(3(x-8)-6x), so:

3(x-8)-6x

We add all the numbers together, and all the variables

-6x+3(x-8)

We multiply parentheses

-6x+3x-24

We add all the numbers together, and all the variables

-3x-24

Back to the equation:

-(-3x-24)



We get rid of parentheses

3x+24-21=0

We add all the numbers together, and all the variables

3x+3=0

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

3x=-3

x=-3/3

x=-1

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