问题 解答题
解方程
(1)x+
2
3
=
4
5
(2)x-
7
8
=
1
4
(3)
1
6
-2x=0.125.
答案

(1)x+

2
3
=
4
5

x+

2
3
-
2
3
=
4
5
-
2
3

x=

2
15

(2)x-

7
8
=
1
4

x-

7
8
+
7
8
=
1
4
+
7
8

x=

9
8

(3)

1
6
-2x=0.125,

1
6
-2x+2x=0.125+2x,

1
6
=0.125+2x,

1
6
-0.125=0.125+2x-0.125,

1
24
=2x,

1
24
÷2=2x÷2,

x=

1
48

多项选择题
填空题