7x=6x+21

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Solution for 7x=6x+21 equation: 



7x=6x+21

We move all terms to the left:

7x-(6x+21)=0

We get rid of parentheses

7x-6x-21=0

We add all the numbers together, and all the variables

x-21=0

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

x=21

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