hyjh315
幼苗
共回答了20个问题采纳率:95% 举报
(1)
2
7 x=
8
21 ,
2
7 x÷
2
7 =
8
21 ÷
2
7 ,
x=
8
21 ×
7
2 ,
x=
4
3 ;
(2)x÷
6
35 =
26
45 ÷
13
25 ,
x÷
6
35 ×
6
35 =
26
45 ×
25
13 ×
6
35 ,
x=
4
21 ;
(3)
2
3 x÷
1
4 =12,
2
3 x÷
1
4 ×4=12×4,
2
3 x=48,
2
3 x÷
2
3 =48÷
2
3 ,
x=48×
3
2 ,
x=72.
1年前
3