-x=-3x

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Solution for -x=-3x equation: 



-x=-3x

We move all terms to the left:

-x-(-3x)=0

We add all the numbers together, and all the variables

-1x-(-3x)=0

We get rid of parentheses

-1x+3x=0

We add all the numbers together, and all the variables

2x=0

x=0/2

x=0

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