Answer
$x=-6$
Work Step by Step
$-x-3=3$
First add 3 to both sides.
$-x=3+3$
$-x=6$
Then multiply both sides by -1.
$-x(-1)=6(-1)$
$x=-6$
Check the answer.
-(-6)-3=3
6-3=3
3=3
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