-x-20=15

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Solution for -x-20=15 equation: 



-x-20=15

We move all terms to the left:

-x-20-(15)=0

We add all the numbers together, and all the variables

-1x-35=0

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

-x=35

x=35/-1

x=-35

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