(-1)x=-x

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Solution for (-1)x=-x equation: 



(-1)x=-x

We move all terms to the left:

(-1)x-(-x)=0

We add all the numbers together, and all the variables

(-1)x-(-1x)=0

We multiply parentheses

-1x-(-1x)=0

We get rid of parentheses

-1x+1x=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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