21-5x=x+9

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Solution for 21-5x=x+9 equation: 



21-5x=x+9

We move all terms to the left:

21-5x-(x+9)=0

We get rid of parentheses

-5x-x-9+21=0

We add all the numbers together, and all the variables

-6x+12=0

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

-6x=-12

x=-12/-6

x=+2

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