问题 解答题
解方程.
x-(1-
3
7
)=
1
4
2x-
3
5
=1-
3
5
1
5
+x+
2
3
=
7
4
答案

(1)x-(1-

3
7
)=
1
4

x-

4
7
=
1
4

x-

4
7
+
4
7
=
1
4
+
4
7

x=

23
28

(2)2x-

3
5
=1-
3
5

2x-

3
5
+
3
5
=1-
3
5
+
3
5

2x=1,

2x÷2=1÷2,

x=

1
2

(3)

1
5
+x+
2
3
=
7
4

x+

13
15
=
7
4

x+

13
15
-
13
15
=
7
4
-
13
15

x=

53
60

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