7x+21=7+21x

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



7x+21=7+21x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

7x-21x-7+21=0

We add all the numbers together, and all the variables

-14x+14=0

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

-14x=-14

x=-14/-14

x=1

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