问题 解答题
(1)
2
3
x+
1
2
x=42
(2)
x
10
=
0.8
4.5
答案

(1)

2
3
x+
1
2
x=42,

2
3
+
1
2
)x=42,

7
6
x=42,

7
6
6
7
=42×
6
7

x=36;

(2)

x
10
=
0.8
4.5

4.5x=8,

4.5x÷4.5=8÷4.5,

x=

16
9

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