21x+28=28x+21

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Solution for 21x+28=28x+21 equation: 



21x+28=28x+21

We move all terms to the left:

21x+28-(28x+21)=0

We get rid of parentheses

21x-28x-21+28=0

We add all the numbers together, and all the variables

-7x+7=0

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

-7x=-7

x=-7/-7

x=1

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