李大婶去布店共买了28M红布和黑布,其中红布每米3元,黑布每米5元.算帐时,售货员错把红布算为每米5元,黑布每米3元,结

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李大婶去布店共买了28M红布和黑布,其中红布每米3元,黑布每米5元.算帐时,售货员错把红布算为每米5元,黑布每米3元,结果收了李大婶108元钱.这样,是布店受了损失还是李大婶多付了钱?说明你的理由.

设买红布x米,黑布y米
x+y=28
5x+3y=108
x=12
y=16
12*3+16*5=116
108

李大婶去布店共买了28M红布和黑布,其中红布每米3元,黑布每米5元.算帐时,售货员错把红布算为每米5元,黑布每米3元,结张婶去布店买了28米的红布和黑布,其中红布每米3元,黑布每米5元,结账时售货员错把红布算作每米5元,黑布每米3元,结果收妈妈去商店买了28米的红布和黑布,其中红布3元1米,黑布5元1米.结帐时,售货员错把红布算作每米5元,黑布每米3元.结果张婶去布店买了28米的黑布和红布.其中红布每米3元黑布每米5元结账时售货员错把红布算作5元李阿姨去布店共买28米的红布和花布,其中红布每米3元,花布每米5元,算账时售货员错把红布算作每米5元,花布每米3元,结果李阿姨到布店买了28米白布和花布,其中白布每米3元,花布每米5元,算帐时售货员错把白布算作每米5元,花布每米3元,结果收买两种布料共138m,花540元,其中,蓝布每米3元,黑布每米5元,两种各买了多少米买两种布共138米花了540元其中蓝布料每米3元黑布每米5元俩种布料各多少米买两种布料共138m,花了540元,其中蓝布料每米3元,黑布料每米5元,两种布各料多少元? 买两种布料共540元.其中蓝布料每米3元,黑布料每米5元,两种布料各买多少米买两种布料共138m,花了540元.其中蓝布料每米3元,黑布料每米5元,两种布料各买了多少米?（方程解答）买两种布料共138m,花了540元,其中蓝布料每米3元,黑布料每米5元,两种布料各买了多少米?