问题 解答题
解方程:
1
2
+X=
2
3
X-
1
8
=
7
8
2X-
3
4
=
1
4
答案

(1)

1
2
+X=
2
3

1
2
+X-
1
2
=
2
3
-
1
2

x=

1
6

(2)X-

1
8
=
7
8

X-

1
8
+
1
8
=
7
8
+
1
8

x=1;

(3)2X-

3
4
=
1
4

2X-

3
4
+
3
4
=
1
4
+
3
4

2x=1,

2x÷2=1÷2,

x=0.5.

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