21x-7=7x+28

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Solution for 21x-7=7x+28 equation: 



21x-7=7x+28

We move all terms to the left:

21x-7-(7x+28)=0

We get rid of parentheses

21x-7x-28-7=0

We add all the numbers together, and all the variables

14x-35=0

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

14x=35

x=35/14

x=2+1/2

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