问题 解答题
2X+30%=9.2X-
1
3
X=
1
6
1
4
3
8
=X:
1
6
3
5
X-5=10.
答案

(1)2X+30%=9.2,

2X+30%-30%=9.2-30%,

2x=8.9,

2x÷2=8.9÷2,

x=4.45;

(2)X-

1
3
X=
1
6

2
3
x=
1
6

2
3
x÷
2
3
=
1
6
÷
2
3

x=

1
4

(3)

1
4
3
8
=X:
1
6

3
8
x=
1
4
×
1
6

3
8
x÷
3
8
=
1
24
÷
3
8

x=

1
9

(4)

3
5
X-5=10,

3
5
x-5+5=10+5,

3
5
x÷
3
5
=15÷
3
5

x=25.

推断题
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