布料计算 39元每kg 1.8米宽 230g 怎样计算几钱每米?

布料计算 39元每kg 1.8米宽 230g 怎样计算几钱每米? 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,两种布料共多少米? 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 买某种布料5米,用去80元,每布料多少元 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? 买两种布科共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? 一人用540元买了两种布料共138米,其中蓝布料每米3元,黑布料每米5元,球两种布料各多少元? 用180元买一种布料,刚好买到整米的布料,商场减价,每米比原价少6元,这样可多买1米,这种布料原价多少? 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, 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