(1)0.3x+7x-0.25x=35.25,
7.05x=35.25,
7.05x÷7.05=35.25÷7.05,
x=5;
(2)
2
3 :0.05=1
7
9 :x,
2
3 x=0.05×1
7
9 ,
2
3 x=
4
45 ,
2
3 x ÷
2
3 =
4
45 ÷
2
3 ,
x=
2
15 .
(1)0.3x+7x-0.25x=35.25,
7.05x=35.25,
7.05x÷7.05=35.25÷7.05,
x=5;
(2)
2
3 :0.05=1
7
9 :x,
2
3 x=0.05×1
7
9 ,
2
3 x=
4
45 ,
2
3 x ÷
2
3 =
4
45 ÷
2
3 ,
x=
2
15 .