X-60%X=160
X -0.6X =160
0.4X =160
X = 160÷0.4
X = 400
X+5分之1X=240
X + 0.2X =240
1.2X =240
X = 240÷1.2
X = 200
7.六年级一班喊瞎与二班人数拿链相等,六年级一班男、女生人数比是2:3,六年级二班男、女郑敏空生人数比是3:4,两班男生人数与女生人数的比是多少? 2 3=5 3
都回答啦啊