(4a-3b)x＞2b-a的解集为x＜4/9
可知4a-3b＜0
(4a-3b)x＞2b-a
x＜(2b-a)/(4a-3b)=4/9
得b/a=5/6即b=5a/6
把b=5a/6代入4a-3b＜0得
4a-3•5a/6＜0
得a＜0
ax＞b
x＜b/a=5/6
ax＞b的解集是x＜5/6