-x-2x=100

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Solution for -x-2x=100 equation: 



-x-2x=100

We move all terms to the left:

-x-2x-(100)=0

We add all the numbers together, and all the variables

-3x-100=0

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

-3x=100

x=100/-3

x=-33+1/3

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