试题:
求x.
3
8
x
-
3
16
x
=
3
8
x:12=0.9:3.6
5
8
:x=
2
3
4
5
5
4
+3x=
3
2
解方程 2016-05-21

答案:

我来补答
(1)
3
8
x-
3
16
x=
3
8

3
16
x=
3
8

3
16
x÷
3
16
=
3
8
÷
3
16

x=2;

(2)x:12=0.9:3.6,
3.6x=12×0.9,
3.6x=10.8,
3.6x÷3.6=10.8÷3.6,
x=3;

(3)
5
8
:x=
2
3
4
5

2
3
x=
5
8
×
4
5

2
3
x÷
2
3
=
1
2
÷
2
3

x=
3
4


(4)
5
4
+3x=
3
2

5
4
+3x-
5
4
=
3
2
-
5
4

3x=
1
4

3x÷3=
1
4
÷
3,
x=
1
12
 
 
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