问题 解答题
解方程:
2
3
=
7
9

1
2
X+
1
3
X=35.
答案

(1)x÷

2
3
=
7
9

x÷

2
3
×
2
3
=
7
9
×
2
3

x=

14
27

(2)

1
2
x+
1
3
x=35,

5
6
x=35,

5
6
6
5
=35×
6
5

x=42.

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