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)
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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?(方程解答)](/uploads/image/z/4558264-16-4.jpg?t=%E4%B9%B0%E4%B8%A4%E7%A7%8D%E5%B8%83%E6%96%99%E5%85%B1138m%2C%E8%8A%B1%E4%BA%86540%E5%85%83.%E5%85%B6%E4%B8%AD%E8%93%9D%E5%B8%83%E6%96%99%E6%AF%8F%E7%B1%B33%E5%85%83%2C%E9%BB%91%E5%B8%83%E6%96%99%E6%AF%8F%E7%B1%B35%E5%85%83%2C%E4%B8%A4%E7%A7%8D%E5%B8%83%E6%96%99%E5%90%84%E4%B9%B0%E4%BA%86%E5%A4%9A%E5%B0%91%E7%B1%B3%3F%EF%BC%88%E6%96%B9%E7%A8%8B%E8%A7%A3%E7%AD%94%EF%BC%89)
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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?(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?(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?(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
设蓝黑个x,y米。
3x+5y=540
x+y=138
然后解方程组
求出x=75 y=63
蓝布 x米
3x+5(138-x)=540
x=75
138-75=63
设蓝布x,黑布y。x+y=138;3x+5y=540;x=75;y=63.
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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