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你沒用數學式子寫,看不大明白.原式是這樣的嗎?180/x=1+360/3x-2/(2x+3)還是180/x=360/(1+3x)-2/(2x+3)
(x-2)×180÷x-360÷x=100(180x-2×180)÷x-360÷x=100(180x-360)÷x-360÷x=100 180-720÷x=100 720÷x=80…
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