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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

2x+x+x-x+x-2+2+2+2-21=0

We add all the numbers together, and all the variables

4x-17=0

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

4x=17

x=17/4

x=4+1/4

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