问题 解答题
解方程.
2
5
x+
3
20
=
17
20
1
4
x+
2
3
x=33
3
4
x=
3
10
÷
4
5
答案

(1)

2
5
x+
3
20
=
17
20

2
5
x+
3
20
-
3
20
=
17
20
-
3
20

2
5
x=
7
10

2
5
2
5
=
7
10
÷
2
5

x=1

3
4

(2)

1
4
x+
2
3
x=33

11
12
x=33

11
12
11
12
=33÷
11
12

x=36;

(3)

3
4
x=
3
10
÷
4
5

3
4
x=
3
8

3
4
3
4
=
3
8
÷
3
4

x=

1
2

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