176500861
幼苗
共回答了29个问题采纳率:93.1% 举报
(1)x+
2
5 =
7
10 ,
x+
2
5 -
2
5 =
7
10 -
2
5 ,
x=
3
10 ;
(2)
5
6 +x=
7
8 ,
5
6 +x-
5
6 =
7
8 -
5
6 ,
x=
1
24 ;
(3)x-
2
9 =
11
12 ,
x-
2
9 +
2
9 =
11
12 +
2
9 ,
x=
41
36 ;
(4)x-
3
4 =
5
8 ,
x-
3
4 +
3
4 =
5
8 +
3
4 ,
x=
11
8 .
1年前
10