小丽买了1个汉堡包和3盒牛奶,共花多少钱?
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Ineedahambergandtwoglassesofmilk
Iwanttwoeggs,onehamburgerandsomemilk.
设一瓶牛奶x元,一个面包y元,得方程组:x+6y=14.5,2x+4y=13,得x=2.5,y=2
3盒牛奶的价钱和2包饼干价钱相等.6盒牛奶就相当于4包饼干.也就是9包饼干花27元.一包就是3元.两包是6元,也就是三盒牛奶是6元,一盒就是2元
汉堡8元、果汁4元.3X+2Y=322X+3Y=28
设汉堡包一个x元,橙汁一杯y元3x+2y=32①2x+3y=28②①+②得5x+5y=60x+y=12代入①x+2(x+y)=32x+24=32x=8y=4
Weboughthamburgers,Frenchfriesandbeverages.
3盒牛奶的钱等于2包饼干的钱6盒牛奶的钱等于4包饼干的钱27元钱相当于买了4+5=9包饼干.买1包饼干的钱27÷9=3(元)买牛奶花的钱27-5×3=12(元)买1包牛奶的钱12÷6=2(元)
3x+2y=322x+3y=28两式联立相减得x=8,y=4
1.MynameisLily.Ilikeeggsandmild.Idon'tlikeice-cream.MygoodfriendLucylikeseatingHambergersandoranges.
牛奶700.酸奶100
每盒牛奶:24-20=4元每个面包:20-4×2=12元
Ihadforahamburgerandsomebroccoli我英语过6级
Mybreakfastisdrinkingmilkandeatinghamburgers.Mylunchisrice.Iameatingdinnerofrice.Myfavoritefoodisham
3盒牛奶的钱等于2包饼干的钱6盒牛奶的钱等于4包饼干的钱27元钱相当于买了4+5=9包饼干.买1包饼干的钱27÷9=3(元)买牛奶花的钱27-5×3=12(元)买1包牛奶的钱12÷6=2(元)求采纳!
Weeathamburgersanddrinkmilkinthemorning.)
Hedoesn'tlikehamburgersandmilkforbreakfast.
设每份汉保包是X元,则每分套餐是X+6.5元则有3*(X+6.5)+5X=553X+19.5+5X=558X=55-19.5=35.5X=4.4375元
havebreakfast/lunch/supperfor...takecareofmyselfsomejuicesomehambergersaglassofmilkhavebreakfasttwog