Here are some blue,white and black balls.The sum of the white and the blue balls is 10,and the sumof the blue and black ones is 7,the black and the white ones is 5.How many balls of each color?

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Herearesomeblue,whiteandblackballs.Thesumofthewhiteandtheblueballsis10,andthesumoftheblueandblackone

Here are some blue,white and black balls.The sum of the white and the blue balls is 10,and the sumof the blue and black ones is 7,the black and the white ones is 5.How many balls of each color?
Here are some blue,white and black balls.The sum of the white and the blue balls is 10,and the sum
of the blue and black ones is 7,the black and the white ones is 5.How many balls of each color?

Here are some blue,white and black balls.The sum of the white and the blue balls is 10,and the sumof the blue and black ones is 7,the black and the white ones is 5.How many balls of each color?
一共有(10+7+5)/2=11
black 11-10=1
white 11-7=4
blue11-5=6

这里有一些蓝色白色和黑色的球。白球和蓝球共有10个,蓝球黑球共有7个,黑球白球共有5个。每种颜色的球各有多少个?

white+blue=10
blue+ black =7
black + white =5
white=4
blue=6
black=1
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