7x-21=6x+18

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Solution for 7x-21=6x+18 equation: 



7x-21=6x+18

We move all terms to the left:

7x-21-(6x+18)=0

We get rid of parentheses

7x-6x-18-21=0

We add all the numbers together, and all the variables

x-39=0

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

x=39

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