1=7x-21

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Solution for 1=7x-21 equation: 



1=7x-21

We move all terms to the left:

1-(7x-21)=0

We get rid of parentheses

-7x+21+1=0

We add all the numbers together, and all the variables

-7x+22=0

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

-7x=-22

x=-22/-7

x=3+1/7

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