180/x+180/(x-2.5)=360/(x-1.5)

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180/x+180/(x-2.5)=360/(x-1.5)
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180/x+180/(x-2.5)=360/(x-1.5)
180/x+180/(x-2.5)=360/(x-1.5)

180/x+180/(x-2.5)=360/(x-1.5)
180/x+180/(x-2.5)=360/(x-1.5)
(180x-450)/(x²-2.5x)+180x/(x²-2.5x)=360/(x-1.5)
(360x-450)/(x²-2.5x)=360/(x-1.5)
360x²-540x-450x+675=360x²-900x
90x=675
x=7.5