-x-2x=-7-x

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



-x-2x=-7-x

We move all terms to the left:

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

We add all the numbers together, and all the variables

-x-2x-(-1x-7)=0

We add all the numbers together, and all the variables

-3x-(-1x-7)=0

We get rid of parentheses

-3x+1x+7=0

We add all the numbers together, and all the variables

-2x+7=0

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

-2x=-7

x=-7/-2

x=3+1/2

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