8x-1=7+21x

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Solution for 8x-1=7+21x equation: 



8x-1=7+21x

We move all terms to the left:

8x-1-(7+21x)=0

We add all the numbers together, and all the variables

8x-(21x+7)-1=0

We get rid of parentheses

8x-21x-7-1=0

We add all the numbers together, and all the variables

-13x-8=0

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

-13x=8

x=8/-13

x=-8/13

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