xy的比例是7:12,x與y的差是5 . 求y
thx alot !!
Maths 比例
2011-08-26 7:27 am
回答 (2)
2011-08-28 2:19 am
✔ 最佳答案
x:y=7:12x/y=7/12..........(1)
y-x=5.............(2)
From (1),
x/y=7/12
x=(7/12 )y
sub x=(7/12)y into (2)
y-(7/12)y=5
12y-7y=5*12
5y=60
y=12//
x=(7/12)y
x=(7/12)(12)
x=7//
2011-08-26 9:11 pm
x/y=7/12------(1)
y-x=5------(2)
From (1), x=(7/12)y------(3)
Sub. (3) into (2),
y-(7/12)y=5
(1-7/12)y=5
5y=5
y=1
y-x=5------(2)
From (1), x=(7/12)y------(3)
Sub. (3) into (2),
y-(7/12)y=5
(1-7/12)y=5
5y=5
y=1
參考: Hope I can help you! ^_^ (From me)
收錄日期: 2021-04-13 18:11:22
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