21+7=3x

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Solution for 21+7=3x equation: 



21+7=3x

We move all terms to the left:

21+7-(3x)=0

We add all the numbers together, and all the variables

-3x+28=0

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

-3x=-28

x=-28/-3

x=9+1/3

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