-x-2x=-7x

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Solution for -x-2x=-7x equation: 



-x-2x=-7x

We move all terms to the left:

-x-2x-(-7x)=0

We add all the numbers together, and all the variables

-3x-(-7x)=0

We get rid of parentheses

-3x+7x=0

We add all the numbers together, and all the variables

4x=0

x=0/4

x=0

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