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X^2(X-8)+3(8-X)=0
We add all the numbers together, and all the variables
X^2(X-8)+3(-1X+8)=0
We multiply parentheses
X^2(X-8)-3X+24=0
We move all terms containing X to the left, all other terms to the right
X^2(X-8)-3X=-24
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