x-21=7x+147

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Solution for x-21=7x+147 equation: 



x-21=7x+147

We move all terms to the left:

x-21-(7x+147)=0

We get rid of parentheses

x-7x-147-21=0

We add all the numbers together, and all the variables

-6x-168=0

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

-6x=168

x=168/-6

x=-28

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