-x-(-x-3)=-9+3x

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Solution for -x-(-x-3)=-9+3x equation: 



-x-(-x-3)=-9+3x

We move all terms to the left:

-x-(-x-3)-(-9+3x)=0

We add all the numbers together, and all the variables

-x-(-1x-3)-(3x-9)=0

We add all the numbers together, and all the variables

-1x-(-1x-3)-(3x-9)=0

We get rid of parentheses

-1x+1x-3x+3+9=0

We add all the numbers together, and all the variables

-3x+12=0

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

-3x=-12

x=-12/-3

x=+4

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