买两种布料共138m,花了540元,其中蓝布料每米3元,黑米料每米5元,两种布料各买了多少米?

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买两种布料共138m,花了540元,其中蓝布料每米3元,黑米料每米5元,两种布料各买了多少米?买两种布料共138m,花了540元,其中蓝布料每米3元,黑米料每米5元,两种布料各买了多少米? 

买两种布料共138m,花了540元,其中蓝布料每米3元,黑米料每米5元,两种布料各买了多少米?
买两种布料共138m,花了540元,其中蓝布料每米3元,黑米料每米5元,两种布料各买了多少米?
 

买两种布料共138m,花了540元,其中蓝布料每米3元,黑米料每米5元,两种布料各买了多少米?
 

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