21x+7=7x+7

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Solution for 21x+7=7x+7 equation: 



21x+7=7x+7

We move all terms to the left:

21x+7-(7x+7)=0

We get rid of parentheses

21x-7x-7+7=0

We add all the numbers together, and all the variables

14x=0

x=0/14

x=0

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