Answer
$-10x-3$
Work Step by Step
The distributive property holds that $a(b+c)=ab+ac$ (for real numbers $a$, $b$, and $c$).
Therefore, $-8x-12+3x-5x+9=(-8+3-5)x+(-12+9)=(-10)x+(-3)=-10x-3$.
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