若2y﹣7x=0(xy≠0),则x:y等于( )A.7:2 B.4:7 C.2:7 ...
问题详情:若2y﹣7x=0(xy≠0),则x:y等于()A.7:2 B.4:7 C.2:7 D.7:4【回答】C.知识点:分式题型:选择题...
问题详情:若2y﹣7x=0(xy≠0),则x:y等于()A.7:2 B.4:7 C.2:7 D.7:4【回答】C.知识点:分式题型:选择题...
问题详情:若2y﹣7x=0(xy≠0),则x:y等于()A.7:2B.4:7C.2:7D.7:4【回答】C解:根据等式*质1,等式两边同加上7x得:2y=7x,∵7y≠0,∴根据等式*质2,两边同除以7y得,=.知识点:分式题型:选择题...