(1)
4
9 :
1
6 =x:15 ,
1
6 x=
4
9 ×15 ,
1
6 x×6=
20
3 ×6 ,
x=40;
(2)4.8x+ 1
1
5 x =18,
6x=18,
6x÷6=18÷6,
x=3;
(3)x ÷
1
3 +7=103,
x ÷
1
3 +7-7=103-7,
x ÷
1
3 ×
1
3 =96×
1
3 ,
x=32.
(1)
4
9 :
1
6 =x:15 ,
1
6 x=
4
9 ×15 ,
1
6 x×6=
20
3 ×6 ,
x=40;
(2)4.8x+ 1
1
5 x =18,
6x=18,
6x÷6=18÷6,
x=3;
(3)x ÷
1
3 +7=103,
x ÷
1
3 +7-7=103-7,
x ÷
1
3 ×
1
3 =96×
1
3 ,
x=32.