0.8(x+0.4)=2.4解:0.8x+0.32=2.4 0.8x=2.4-0.32 0.8x=1.08 x=1.35
0.8x+0.32=2.40.8x=2.4—0.320.8x=2.08x=2.08÷0.8x=2.6
╳+0.4=2.4÷0.8╳+0.4=3╳=2.6