-x-15=x+3

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Solution for -x-15=x+3 equation: 



-x-15=x+3

We move all terms to the left:

-x-15-(x+3)=0

We add all the numbers together, and all the variables

-1x-(x+3)-15=0

We get rid of parentheses

-1x-x-3-15=0

We add all the numbers together, and all the variables

-2x-18=0

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

-2x=18

x=18/-2

x=-9

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