问题 解答题
解方程.
1
6
=
3
4
7
15
=
2
5
6
7
=
1
3
2
5
x=
18
25
答案

(1)x÷

1
6
=
3
4

      x÷

1
6
×
1
6
=
3
4
×
1
6

             x=

1
8

(2)x×

7
15
=
2
5

 x×

7
15
÷
7
15
=
2
5
÷
7
15

          x=

6
7

(3)x÷

6
7
=
1
3

  x÷

6
7
×
6
7
=
1
3
×
6
7

         x=

2
7

(4)

2
5
x=
18
25

 

2
5
x÷
2
5
=
18
25
÷
2
5

       x=1.8.

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