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~
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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,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,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~
设蓝布X米,则黑布(138-x)米
3x+(138-x)5=540
3x+690-5x=540
690-2x=540
2x=150
x=75
所以黑布:138-75=63米
蓝布:75乘3=225元
黑布:63乘5=315元
3*x+(138-x)*5=540
设买蓝布料X米,则黑布料为(138-X),列方程式:3x+(138-x)=540
解得:x=70,
蓝布料70m,黑布料68m
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?
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~
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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
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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