问题 解答题
10×x=
8
25
33÷x=
11
20
3
5
=18×
1
4
1
3
×
3
5
=4.
4x-3×9=29
1
2
x+
1
6
x=4.
3
4
x+
1
4
=
3
8
答案

(1)10×x=

8
25

10×x÷10=

8
25
÷10,

x=

4
125

(2)33÷x=

11
20

33÷x×x=

11
20
×x,

11
20
×x=33,

11
20
×x÷
11
20
=33÷
11
20
,.

x=60;

(3)x×

3
5
=18×
1
4

3
5
=
9
2

3
5
÷
3
5
=
9
2
÷
3
5

x=

15
2

(4)x×

1
3
×
3
5
=4,

1
5
=4,

1
5
÷
1
5
=4÷
1
5

x=20;

(5)4x-3×9=29,

4x-27+27=29+27,

4x=56,

x=14;

(6)

1
2
x+
1
6
x=4,

2
3
x=4,

2
3
x÷
2
3
=4÷
2
3

x=6;

(7)

3
4
x+
1
4
=
3
8

3
4
x+
1
4
-
1
4
=
3
8
-
1
4

3
4
x=
1
8

3
4
x÷
3
4
=
1
8
÷
3
4

x=

1
6

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