5
9 :x=
2
9 ,
2
9 x=
5
9 ,
x=
5
2 ;
1
3 x-
2
3 +
1
3 =4,
1
3 x=4+
1
3 ,
1
3 x=
13
3 ,
x=13;
60%x÷
6
25 =
5
4 ,
0.6x=
5
4 ×
6
25 ,
0.6x=0.3,
x=0.5.
5
9 :x=
2
9 ,
2
9 x=
5
9 ,
x=
5
2 ;
1
3 x-
2
3 +
1
3 =4,
1
3 x=4+
1
3 ,
1
3 x=
13
3 ,
x=13;
60%x÷
6
25 =
5
4 ,
0.6x=
5
4 ×
6
25 ,
0.6x=0.3,
x=0.5.