买两种布料共138m,花了540元,蓝布料每米3元,黑的每米5元,两种各买了几米

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 列方程并解答 买两种布料共138m,花了540元.其中篮布料每米3元,黑布料每米5元,两种布料个买列方程并解答买两种布料共138m,花了540元.其中篮布料每米3元,黑布料每米5元,两种布料个买了多少米? 买两种布料共138m,花了540元,其中蓝布料每米3元,黑布料每米5元,两种布各料多少元? 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138米,花了540元.其中蓝布料每米3元,黑布料每米5元,两种布料共多少米? 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? 买两种布料共138m,花了540元,其中蓝布料每米5元,黑布料每米3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,黑布料每米5元,两种布料各买了多少米?(要式子、要答案.) 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?（用方程解） 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?用一元一次方程解答~ 买两种布料共138m,花了540元,蓝布料每米3元,黑的每米5元,两种各买了几米 初一数学上册书P103一个人用540元买了两种布料共138米,蓝布每米3元,黑布每米5元.两种布料各多少米.另外还有没P103的答案 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138米,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?要列方程, 某顾客用540元买下两种布料共46米,其中蓝布料每米9元,黑布料每米15元,求两种布料各买了多少?我看到您回答了这个问题的算术方法：蓝布=(15*46-540)/(15-9)=25黑布=46-25=21(15*46-540)这里是假设黑布 买两种布料共183米,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 顾客用540元买了两种花布138尺其中蓝布每尺3元.花布每尺5元问蓝布花布各多少?