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Schools are the number of ball and football?

哈哈2010-01-18 03:01:20 +0000 #1
Ball and soccer schools are a total of 100, ball number 1 / 3 to the Number 1 football / more than 10 to 16. Schools are the number of ball and football?

2009 -11-14 14:33 supplementary question

Please provide a detailed point, thank you pull!
B-Boy2010-01-18 03:04:11 +0000 #2
set up soccer ball X number of number of Y

is: X + Y = 100

1/3X - 1 / 10Y = 16

Solution: get X = 60 Y = 40
ziqichen192010-01-18 03:19:53 +0000 #3
60 balls, 40 soccer.

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