0.4(x-0.2)+1.5=0.8x-0.38
0.4x-0.4*0.2+1.5=0.8x-0.38
移项
0.8x-0.4x=1.5-0.4*0.2+0.38
0.4x=1.8
x=1.8÷0.4
x=4.5