(1)求x:y的值 (x+y):y=4:5 (2)若a/b=c/d(bd≠0),则a/(a-b)=a/(c-d).请说明理由.
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(1)求x:y的值(x+y):y=4:5(2)若a/b=c/d(bd≠0),则a/(a-b)=a/(c-d).请说明理由.(1)求x:y的值(x+y):y=4:5(2)若a/b=c/d(bd≠0),则
(1)求x:y的值 (x+y):y=4:5 (2)若a/b=c/d(bd≠0),则a/(a-b)=a/(c-d).请说明理由.
(1)求x:y的值 (x+y):y=4:5 (2)若a/b=c/d(bd≠0),则a/(a-b)=a/(c-d).请说明理由.
(1)求x:y的值 (x+y):y=4:5 (2)若a/b=c/d(bd≠0),则a/(a-b)=a/(c-d).请说明理由.
(1)∵ (x+y):y=4:5
∴5x+5y=4y
∴y=-5x
∴x/y=-1/5
第二题题目是不是错啦
1)x=1;y=-5;x:y=-0.2
2)
1)x=1;y=-5;x:y=-0.2
2)
1. -1:5 2. 第二题算不出来 打错了吧!!
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