问题 解答题
解方程.
x-
1
3
+
2
5
=
5
9

x+
1
4
=
8
25
答案

(1)x-

1
3
+
2
5
=
5
9

x-

1
3
+
2
5
+
1
3
=
5
9
+
1
3

x+

2
5
=
8
9

x+

2
5
-
2
5
=
8
9
-
2
5

x=

22
45

(2)x+

1
4
=
8
25

x+

1
4
-
1
4
=
8
25
-
1
4

x=

7
100

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