2x+3-3+x=21-x-3+x

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Solution for 2x+3-3+x=21-x-3+x equation: 



2x+3-3+x=21-x-3+x

We move all terms to the left:

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

We add all the numbers together, and all the variables

2x+x+3-3-18=0

We add all the numbers together, and all the variables

3x-18=0

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

3x=18

x=18/3

x=6

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