13=x-1-8x

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Solution for 13=x-1-8x equation: 



13=x-1-8x

We move all terms to the left:

13-(x-1-8x)=0

We add all the numbers together, and all the variables

-(-7x-1)+13=0

We get rid of parentheses

7x+1+13=0

We add all the numbers together, and all the variables

7x+14=0

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

7x=-14

x=-14/7

x=-2

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