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4(2x-1)-2(x-1)=25原方程為:(8x-4)-(2x-2)=25則8x-4-2x+2=25得到:6x-2=25 6x=27 x=9/2同學,請百忙中抽出一點時間,尊重別人幫助你所付出的辛勤勞動!
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