设男为X,女为Y
X+Y=46
4/5Y=3/2X
X=46-Y
4/5Y=3/2(46-Y)
4/5Y=3/2*46-3/2Y
4/5Y=69-3/2Y
4/5Y+3/2Y=69
Y(4/5+3/2)=69
Y=69/(4/5+3/2)
Y=69/(8/10+15/10)
Y=69/(23/10)
Y=69*10/23
Y=30
X=46-30=16
男生是16人.女生是30人
设男为X,女为Y
X+Y=46
4/5Y=3/2X
X=46-Y
4/5Y=3/2(46-Y)
4/5Y=3/2*46-3/2Y
4/5Y=69-3/2Y
4/5Y+3/2Y=69
Y(4/5+3/2)=69
Y=69/(4/5+3/2)
Y=69/(8/10+15/10)
Y=69/(23/10)
Y=69*10/23
Y=30
X=46-30=16
男生是16人.女生是30人