题目内容
解方程.
(1)x÷
|
(2)
|
(3)
|
(4)
|
(1)x÷
=
,
x÷
×
=
×
,
x=
;
(2)
÷x=
,
÷x×x=
×x,
×x=
,
×x×
=
×
,
x=
;
(3)
x+
=
,
x+
-
=
-
,
x=
,
x×4=
×4,
x=
;
(4)
-3x=
,
-3x+3x=
+3x,
+3x=
,
+3x-
=
-
,
3x=
,
3x÷3=
÷3,
x=
.
6 |
25 |
5 |
12 |
x÷
6 |
25 |
6 |
25 |
5 |
12 |
6 |
25 |
x=
1 |
10 |
(2)
7 |
18 |
14 |
27 |
7 |
18 |
14 |
27 |
14 |
27 |
7 |
18 |
14 |
27 |
27 |
14 |
7 |
18 |
27 |
14 |
x=
3 |
4 |
(3)
1 |
4 |
3 |
4 |
5 |
6 |
1 |
4 |
3 |
4 |
3 |
4 |
5 |
6 |
3 |
4 |
1 |
4 |
1 |
12 |
1 |
4 |
1 |
12 |
x=
1 |
3 |
(4)
6 |
7 |
3 |
14 |
6 |
7 |
3 |
14 |
3 |
14 |
6 |
7 |
3 |
14 |
3 |
14 |
6 |
7 |
3 |
14 |
3x=
9 |
14 |
3x÷3=
9 |
14 |
x=
3 |
14 |
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