2x-(3-4x)=21

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



2x-(3-4x)=21

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

2x+4x-3-21=0

We add all the numbers together, and all the variables

6x-24=0

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

6x=24

x=24/6

x=4

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