问题 解答题
求未知数x.
(1)436÷x=10×25%
(2)x-108÷1.5=70÷150%
(3)0.4:
4
5
=x:60
(4)
4
5
1
6
=24:2x.
答案

(1)436÷x=10×25%,

436÷x=2.5,

436÷x×x=2.5×x,

2.5x=436,

2.5x÷2.5=436÷2.5,

x=174.4;

(2)x-108÷1.5=70÷150%,

x-72=70÷

3
2

x-72+72=

140
3
+72,

x=

356
3

(3)0.4:

4
5
=x:60,

4
5
x=0.4×60,

4
5
x=24,

4
5
5
4
=24×
5
4

x=30;

(4)

4
5
1
6
=24:2x,

4
5
×2x=
1
6
×24,

8
5
x=4,

8
5
5
8
=4×
5
8

x=

5
2

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