8x+21=21+8x

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Solution for 8x+21=21+8x equation: 



8x+21=21+8x

We move all terms to the left:

8x+21-(21+8x)=0

We add all the numbers together, and all the variables

8x-(8x+21)+21=0

We get rid of parentheses

8x-8x-21+21=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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