问题 解答题
解方程:
(1)2x-
2
3
=
4
3
(2)x+
4
5
=2
(3)2.5x-1.3x=1.44(4)
1
4
1
8
=x:
1
10
答案

(1)2x-

2
3
=
4
3

2x-

2
3
+
2
3
=
4
3
+
2
3

2x=2,

2x÷2=2÷2,

x=1;

(2)x+

4
5
=2

x+

4
5
-
4
5
=2-
4
5

x=1

1
5

(3)2.5x-1.3x=1.44

(2.5-1.3)x=1.44,

1.2x=1.44,

1.2x÷1.2=1.44÷1.2,

x=1.2;

(4)

1
4
1
8
=x:
1
10

1
8
x=
1
4
×
1
10

1
8
x=
1
40

1
8
1
8
=
1
40
÷
1
8

x=

1
5

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