7x+21=6x-2

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Solution for 7x+21=6x-2 equation: 



7x+21=6x-2

We move all terms to the left:

7x+21-(6x-2)=0

We get rid of parentheses

7x-6x+2+21=0

We add all the numbers together, and all the variables

x+23=0

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

x=-23

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