妖女hong
幼苗
共回答了11个问题采纳率:81.8% 举报
①x÷
5
6 =30,
x÷
5
6 ×
5
6 =30×
5
6 ,
x=25;
②
3
5 x -
1
4 x=7,
(
3
5 -
1
4 )x=7,
7
20 x=7,
7
20 x×
20
7 =7×
20
7 ,
x=20;
③
8
11 :10=
4
5 :x,
8
11 x=
4
5 ×10,
8
11 x=8,
8
11 x×
11
8 =8×
11
8 ,
x=11;
④
0.7
0.5 =
x
35 ,
0.5x=35×0.7,
0.5x÷0.5=24.5÷0.5,
x=49.
1年前
3