28-x=7-8x

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Solution for 28-x=7-8x equation: 



28-x=7-8x

We move all terms to the left:

28-x-(7-8x)=0

We add all the numbers together, and all the variables

-x-(-8x+7)+28=0

We add all the numbers together, and all the variables

-1x-(-8x+7)+28=0

We get rid of parentheses

-1x+8x-7+28=0

We add all the numbers together, and all the variables

7x+21=0

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

7x=-21

x=-21/7

x=-3

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