這一題又要怎麼解呢?? 已知(x+3y):(3x+2y)=2:3,則(x+y):(x-y)的比值為何?

2017-04-03 7:38 pm

回答 (1)

2017-04-03 7:49 pm
Sol
xy<>0
(x+3y):(3x+2y)=2:3
3(x+3y)=2(3x+2y)
3x+9y=6x+4y
3x=5y=15t
x=5t,y=3t,t<>0
(x+y):(x-y)
=8t:2t
=4:1


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