(3-A)/2>3(A-2)3-A>6A-12-7A>-15A<15/7A*(X-4)/3>X-AAX-4A>3X-3AAX-A>3XA(X-1)>3XA>3X/(X-1)∴15/7>3X/(X-1)15X-15>21X-6X>15∴X<-2.5