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

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



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

We move all terms to the left:

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

x-15=0

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

x=15

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