①6x-3.6×2=9.6,
6x-7.2=9.6,
6x-7.2+7.2=9.6+7.2,
6x=16.8,
6x÷6=16.8÷6,
x=2.8;
②9x-4.6x=15.4,
(9-4.6)x=15.4,
4.4x=15.4,
4.4x÷4.4=15.4÷4.4,
x=3.5;
③14.5-x+12=18.4,
26.5-x=18.4,
26.5-x+x=18.4+x,
18.4+x=26.5,
18.4+x-18.4=26.5-18.4,
x=8.1.