(-x)-2x=-7)

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



(-x)-2x=-7)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

-2x+(-1x)=0

We get rid of parentheses

-2x-1x=0

We add all the numbers together, and all the variables

-3x=0

x=0/-3

x=0

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