求英语数学应用题解答,急鸡肉每磅6美元,香肠每磅3美元,米饭每磅1美元.她在13又二分之一磅的食物上花了42美元.她买的米饭是香肠的2倍.Write a system of three equations that represents how much food Simone

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求英语数学应用题解答,急鸡肉每磅6美元,香肠每磅3美元,米饭每磅1美元.她在13又二分之一磅的食物上花了42美元.她买的米饭是香肠的2倍.Write a system of three equations that represents how much food Simone
求英语数学应用题解答,急
鸡肉每磅6美元,香肠每磅3美元,米饭每磅1美元.她在13又二分之一磅的食物上花了42美元.她买的米饭是香肠的2倍.
Write a system of three equations that represents how much food Simone purchased

求英语数学应用题解答,急鸡肉每磅6美元,香肠每磅3美元,米饭每磅1美元.她在13又二分之一磅的食物上花了42美元.她买的米饭是香肠的2倍.Write a system of three equations that represents how much food Simone
鸡肉x,香肠y,米饭z
x+y+z=13.5
6x+3y+z=42
z=2y
解得
x=4.5
y=3
z=6

鸡肉重为X,香肠重为Y,米饭为2Y,
6X+3Y+2Y=42 X+Y+2Y=13 1/2 X= 4.5 Y=3 米饭为6

假设鸡肉买了X磅,香肠Y磅,米饭Z磅
列方程式如下:
Z=2Y
X+Y+Z=13 1/2
6X+3Y+Z=42

得出学X=4.5
Y=3
Z=6

鸡肉x,香肠y,米饭z
x+y+z=13.5
6x+3y+z=42
z=2y
x=4.5
y=3
z=6