题目内容
解方程.
|
x+
|
4-
|
(1)
:x=
,
x=
,
x×
=
×
,
x=
;
(2)x+
x=
,
(1+
)x=
,
x=
,
x×
=
×
,
x=
;
(3)4-
x=
,
4-
x+
x=
+
x,
+
x=4,
+
x-
=4-
,
x=
,
x×
=
×
,
x=
.
| 3 |
| 5 |
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 5 |
| 3 |
| 8 |
| 8 |
| 3 |
| 3 |
| 5 |
| 8 |
| 3 |
x=
| 8 |
| 5 |
(2)x+
| 3 |
| 7 |
| 3 |
| 7 |
(1+
| 3 |
| 7 |
| 3 |
| 7 |
| 10 |
| 7 |
| 3 |
| 7 |
| 10 |
| 7 |
| 7 |
| 10 |
| 3 |
| 7 |
| 7 |
| 10 |
x=
| 3 |
| 10 |
(3)4-
| 5 |
| 6 |
| 1 |
| 2 |
4-
| 5 |
| 6 |
| 5 |
| 6 |
| 1 |
| 2 |
| 5 |
| 6 |
| 1 |
| 2 |
| 5 |
| 6 |
| 1 |
| 2 |
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 2 |
| 5 |
| 6 |
| 7 |
| 2 |
| 5 |
| 6 |
| 6 |
| 5 |
| 7 |
| 2 |
| 6 |
| 5 |
x=
| 21 |
| 5 |
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