2x-21=x+6

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Solution for 2x-21=x+6 equation: 



2x-21=x+6

We move all terms to the left:

2x-21-(x+6)=0

We get rid of parentheses

2x-x-6-21=0

We add all the numbers together, and all the variables

x-27=0

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

x=27

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