题目内容

解方程.
(1-
7
8
)x=
21
40

x+
7
10
x
=34
x÷
7
15
=
15
36
÷
5
24
(1)(1-
7
8
)x=
21
40

             
1
8
x=
21
40

          
1
8
x÷
1
8
=
21
40
÷
1
8

               x=4.2;

(2)x+
7
10
x=34,
      1.7x=34,
 1.7x÷1.7=34÷1.7,
         x=20;

(3)x÷
7
15
=
15
36
÷
5
24

     x÷
7
15
=2,
     x÷
7
15
=2÷
7
15

         x=4
2
7
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网