3+21=-4(2x-6)

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Solution for 3+21=-4(2x-6) equation: 



3+21=-4(2x-6)

We move all terms to the left:

3+21-(-4(2x-6))=0

We add all the numbers together, and all the variables

-(-4(2x-6))+24=0



We calculate terms in parentheses: -(-4(2x-6)), so:

-4(2x-6)

We multiply parentheses

-8x+24

Back to the equation:

-(-8x+24)



We get rid of parentheses

8x-24+24=0

We add all the numbers together, and all the variables

8x=0

x=0/8

x=0

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