(1)4.5x+3.8x=l6.6,
8.3x=16.6,
8.3x÷8.3=16.6÷8.3,
x=2;
(2)
1
4 :x=
1
2 :
1
6 ,
1
2 x=
1
4 ×
1
6 ,
1
2 x ÷
1
2 =
1
24 ÷
1
2 ,
x=
1
12 .
(1)4.5x+3.8x=l6.6,
8.3x=16.6,
8.3x÷8.3=16.6÷8.3,
x=2;
(2)
1
4 :x=
1
2 :
1
6 ,
1
2 x=
1
4 ×
1
6 ,
1
2 x ÷
1
2 =
1
24 ÷
1
2 ,
x=
1
12 .