7x-21=9x+1

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Solution for 7x-21=9x+1 equation: 



7x-21=9x+1

We move all terms to the left:

7x-21-(9x+1)=0

We get rid of parentheses

7x-9x-1-21=0

We add all the numbers together, and all the variables

-2x-22=0

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

-2x=22

x=22/-2

x=-11

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