X+7=21x=

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Solution for X+7=21x= equation: 



X+7=21X=

We move all terms to the left:

X+7-(21X)=0

We add all the numbers together, and all the variables

-20X+7=0

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

-20X=-7

X=-7/-20

X=7/20

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