A lot of people are having lunch in a big room.Four people are drinking a bowl of water.Two are eating a bowl of rice.Three are eating a bowl of meat.They need 52 bowls.How many people are there?
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A lot of people are having lunch in a big room.Four people are drinking a bowl of water.Two are eating a bowl of rice.Three are eating a bowl of meat.They need 52 bowls.How many people are there?
A lot of people are having lunch in a big room.Four people are drinking a bowl of water.
Two are eating a bowl of rice.Three are eating a bowl of meat.They need 52 bowls.How many people are there?
A lot of people are having lunch in a big room.Four people are drinking a bowl of water.Two are eating a bowl of rice.Three are eating a bowl of meat.They need 52 bowls.How many people are there?
如果我理解题目没有错的话这样做就很简单
很多人在一个大房间里吃午餐,其中4个人喝一碗水,2个人吃一碗饭,3个人吃一碗肉,一共需要52个碗,请问一共多少个人?
喝水的y碗,饭的x碗,肉的z碗
因为总人数相同得到2x=4y=3z
因为一共52碗所以x+y+z=52
从上面一个式子得到x=2y=3/2z和y=3/4z
并代入第二个式子得到2y+y+z=52
3y+z=52
9/4z+z=52
13/4z=52
z=16
得出z以后由上面的关系式得出总人数=3z=16*3=48人
同时为了检验分别得出x=24,2x=48人
y=12,4y=48人
There are 48 people!
不要告诉我LZ你是外国的要我用英文给你写一遍…………