问题 解答题
x
15
=30
7
16
:x=
7
8
32
9

1
2
x+
1
3
x=
5
6
答案

(1)

x
15
=30,

x
15
×15=30×15,

x=450,

(2)

7
16
:x=
7
8
32
9

7
8
x=
7
16
×
32
9

7
8
8
7
=
14
9
×
8
7

x=

16
9

(2)

1
2
x+
1
3
x=
5
6

5
6
x=
5
6

5
6
6
5
=
5
6
×
6
5

x=1.

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