21+1x=21+3x

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Solution for 21+1x=21+3x equation: 



21+1x=21+3x

We move all terms to the left:

21+1x-(21+3x)=0

We add all the numbers together, and all the variables

1x-(3x+21)+21=0

We add all the numbers together, and all the variables

x-(3x+21)+21=0

We get rid of parentheses

x-3x-21+21=0

We add all the numbers together, and all the variables

-2x=0

x=0/-2

x=0

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