2x-4(x-3)=-9+4x-21

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Solution for 2x-4(x-3)=-9+4x-21 equation: 



2x-4(x-3)=-9+4x-21

We move all terms to the left:

2x-4(x-3)-(-9+4x-21)=0

We add all the numbers together, and all the variables

2x-4(x-3)-(4x-30)=0

We multiply parentheses

2x-4x-(4x-30)+12=0

We get rid of parentheses

2x-4x-4x+30+12=0

We add all the numbers together, and all the variables

-6x+42=0

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

-6x=-42

x=-42/-6

x=+7

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