x-1.5=2分之(x+0.4)
x-1.5=0.5x+0.2
0.5x=1.7
x=3.4纳尼，答案应该是3.8啊x-1.5=2分之x+0.4
x-1.5=0.5x+0.4
0.5x=1.9
x=3.8我想通了，O(∩_∩)O谢谢