-21=-3x+2(2x-14)

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Solution for -21=-3x+2(2x-14) equation: 



-21=-3x+2(2x-14)

We move all terms to the left:

-21-(-3x+2(2x-14))=0



We calculate terms in parentheses: -(-3x+2(2x-14)), so:

-3x+2(2x-14)

We multiply parentheses

-3x+4x-28

We add all the numbers together, and all the variables

x-28

Back to the equation:

-(x-28)



We get rid of parentheses

-x+28-21=0

We add all the numbers together, and all the variables

-1x+7=0

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

-x=-7

x=-7/-1

x=+7

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