20-3(x-10)=3(x-5)=简便计算

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20-3(x-10)=3(x-5)=简便计算
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20-3(x-10)=3(x-5)=简便计算
20-3(x-10)=3(x-5)=简便计算
 

20-3(x-10)=3(x-5)=简便计算