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(x-48)÷3分之2-(x+15)÷4分之5=14 (x-48)×3/2-(x+15)×4/5=14 去分母:15(x-48)-8(x+15)=140 去括弧:15x-720-8x-120=140 移項:15x-8x=140+720+120 合併同類項:7X=980 係數化為1:X=140
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