1.2x+0.16/0.2=3.20.24x+0.16=0.640.24x=0.64-0.160.24x=0.48 x=0.48÷0.24 x=2
1.2x+0.16/0.2=3.212x=3.2-16/2012x=3.2-4/512x=3.2-0.812x=2.4x=2.4/12x=24/120(约分)x=1/5
1.2x+0.8=3.21.2x=4x=10分之3
