21+2x=9x+21

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Solution for 21+2x=9x+21 equation: 



21+2x=9x+21

We move all terms to the left:

21+2x-(9x+21)=0

We get rid of parentheses

2x-9x-21+21=0

We add all the numbers together, and all the variables

-7x=0

x=0/-7

x=0

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