x-21=7x+27

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Solution for x-21=7x+27 equation: 



x-21=7x+27

We move all terms to the left:

x-21-(7x+27)=0

We get rid of parentheses

x-7x-27-21=0

We add all the numbers together, and all the variables

-6x-48=0

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

-6x=48

x=48/-6

x=-8

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