-x-2x-3x=18

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Solution for -x-2x-3x=18 equation: 



-x-2x-3x=18

We move all terms to the left:

-x-2x-3x-(18)=0

We add all the numbers together, and all the variables

-6x-18=0

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

-6x=18

x=18/-6

x=-3

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