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x(35-2x)=150 35x-2x²;=150 4x²;-35x+150=0 △=(-35)²;78;-4x2x150=25 x=(35±5)/4 ∴x=15/2或x=10
去分母得:960-600=90x 合併同類項,得360=90x 係數化為1,得4=x 即x=4 經檢驗,x=4是原方程的解.
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