试题:
解方程.
(1)
2
5
x=
24
7
(2)35x×
2
7
=
5
6
(3)
3
5
-9x=
3
10
(4)(
7
3
+
4
15
)x=3
5
7
解方程 2016-05-21

答案:

我来补答
(1)
2
5
x=
24
7

2
5
2
5
=
24
7
÷
2
5

x=
60
7


(2)35x×
2
7
=
5
6

10x=
5
6

10x÷10=
5
6
÷10,
x=
1
12


(3)
3
5
-9x=
3
10

3
5
-9x+9x=
3
10
+9x,
9x+
3
10
=
3
5

9x+
3
10
-
3
10
=
3
5
-
3
10

9x=
3
10

9x÷9=
3
10
÷9,
x=
1
30


(4)(
7
3
+
4
15
)x=3
5
7

13
5
x=3
5
7

13
5
13
5
=3
5
7
÷
13
5

x=
10
7
 
 
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