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方程七括号y-20括号=140怎么解
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出门在外也不愁7-（x-20）=140 怎么解&
解:x-20=140÷7x-20=20x=20+20x=40
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扫描下载二维码7(x一20)=140解方程
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扫描下载二维码7(x-20)=140怎么样求出方程的解?
【忧伤丶】iwMJ
7(x-20)=140x-20=20x=40
望采纳，谢谢^ω^
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7(x-20)=140 x-20=20x=40 谢谢请采纳
7x-140=1407x=280x=40
扫描下载二维码}