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

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



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

We move all terms to the left:

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

We multiply parentheses

-4x-(4x+9)+6-21=0

We get rid of parentheses

-4x-4x-9+6-21=0

We add all the numbers together, and all the variables

-8x-24=0

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

-8x=24

x=24/-8

x=-3

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