7=7-x-8x

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



7=7-x-8x

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(-9x+7)+7=0

We get rid of parentheses

9x-7+7=0

We add all the numbers together, and all the variables

9x=0

x=0/9

x=0

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