问题 解答题
解方程.
x+
17
19
=
23
19

x-4
2
3
=
1
5

5
7
-x=
3
14
答案

(1)x+

17
19
=
23
19

x+

17
19
-
17
19
=
23
19
-
17
19

x=

6
19

(2)x-4

2
3
=
1
5

x-4

2
3
+4
2
3
=
1
5
+4
2
3

x=4

13
15

(3)

5
7
-x=
3
14

5
7
-x+x=
3
14
+x,

3
14
+x=
5
7

3
14
+x-
3
14
=
5
7
-
3
14

x=

1
2

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