21-6x=21-8x

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Solution for 21-6x=21-8x equation: 



21-6x=21-8x

We move all terms to the left:

21-6x-(21-8x)=0

We add all the numbers together, and all the variables

-6x-(-8x+21)+21=0

We get rid of parentheses

-6x+8x-21+21=0

We add all the numbers together, and all the variables

2x=0

x=0/2

x=0

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