21=-4(-6x-3)

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Solution for 21=-4(-6x-3) equation: 



21=-4(-6x-3)

We move all terms to the left:

21-(-4(-6x-3))=0



We calculate terms in parentheses: -(-4(-6x-3)), so:

-4(-6x-3)

We multiply parentheses

24x+12

Back to the equation:

-(24x+12)



We get rid of parentheses

-24x-12+21=0

We add all the numbers together, and all the variables

-24x+9=0

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

-24x=-9

x=-9/-24

x=3/8

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