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X-12(2X-8)=X-9(2X-9)
We move all terms to the left:
X-12(2X-8)-(X-9(2X-9))=0
We multiply parentheses
X-24X-(X-9(2X-9))+96=0
We calculate terms in parentheses: -(X-9(2X-9)), so:We add all the numbers together, and all the variables
X-9(2X-9)
We multiply parentheses
X-18X+81
We add all the numbers together, and all the variables
-17X+81
Back to the equation:
-(-17X+81)
-23X-(-17X+81)+96=0
We get rid of parentheses
-23X+17X-81+96=0
We add all the numbers together, and all the variables
-6X+15=0
We move all terms containing X to the left, all other terms to the right
-6X=-15
X=-15/-6
X=2+1/2
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