3/10+x=3/5x=3/5-3/10 =6/10-3/10 =3/10所以x=3/10
3/10+x=3/5X=3/5-3/10X=6/10-3/10,x=3/10
3/10+x=3/5解:x=6/10-3/10x=3/10