3.5÷x=1.2 3.5/x=1.2 1.2x=3.5 x=3.5/1.2 22.5*0.48+7.75*0.48 =48/100*(22.5+7.75) =12/25*121/4 =363/25 2-6/13÷9/26-2/3 =2-6/13*26/9-2/3 =2-4/3-2/3 =0
