21=9x+5-5

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



21=9x+5-5

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(+9x)+21=0

We get rid of parentheses

-9x+21=0

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

-9x=-21

x=-21/-9

x=2+1/3

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