问题 解答题
求未知数X.
5X-
2
3
=
1
3
X-
3
4
+
1
6
=
1
2
X+
1
2
=
11
12
答案

(1)5x-

2
3
=
1
3

5x-

2
3
+
2
3
=
1
3
+
2
3

5x=1,

5x÷5=1÷5,

x=

1
5

(2)x-

3
4
+
1
6
=
1
2

x-

3
4
+
1
6
-
1
6
=
1
2
-
1
6

x-

3
4
=
1
3

x-

3
4
+
3
4
=
1
3
+
3
4

x=1

1
12

(3)x+

1
2
=
11
12

x+

1
2
-
1
2
=
11
12
-
1
2

x=

5
12

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