问题 解答题
求未知数X.
(1)
4
5
X×(
1
2
+0.4)=4.32
(2)X÷3+X÷2=16.
答案

(1)

4
5
X×(
1
2
+0.4)=4.32,

4
5
9
10
=4.32,

4
5
9
10
÷
9
10
=4.32÷
9
10

4
5
X=4.8,

4
5
X÷
4
5
=4.8÷
4
5

X=6;

(2)X÷3+X÷2=16,

5
6
X=16,

5
6
X÷
5
6
=16÷
5
6

X=19.2.

单项选择题
单项选择题