-1-(-9)=x

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Solution for -1-(-9)=x equation: 



-1-(-9)=x

We move all terms to the left:

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

We add all the numbers together, and all the variables

-1x+8=0

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

-x=-8

x=-8/-1

x=+8

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