解方程. x÷ 1 6 = 3 4 x× 7 15 = 2 5

解方程. x÷ 1 6 = 3 4 x× 7 15 = 2 5 x÷ 6 7 = 1 3 2 5 x= 18 25 .

(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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