问题 解答题
解下列方程.
x-
1
3
=
3
4
x+
1
4
=
5
7
x-
7
12
=
1
8
x-
9
10
=1
答案

(1)x-

1
3
=
3
4

x-

1
3
+
1
3
=
3
4
+
1
3

x=1

1
12

(2)x+

1
4
=
5
7

x+

1
4
-
1
4
=
5
7
-
1
4

x=

13
28

(3)x-

7
12
=
1
8

x-

7
12
+
7
12
=
1
8
+
7
12

x=

17
24

(4)x-

9
10
=1

x-

9
10
+
9
10
=1+
9
10

x=1

9
10

单项选择题 A3/A4型题
解答题