题目内容
解方程
x+
| x-
| x+(
|
(1)x+
=
,
x+
-
=
-
,
x=1
;
(2)x-
=
,
x-
+
=
+
,
x=3;
(3)x+(
+
)=
,
x+
=
,
x+
-
=
-
,
x=-
.
| 1 |
| 5 |
| 7 |
| 4 |
x+
| 1 |
| 5 |
| 1 |
| 5 |
| 7 |
| 4 |
| 1 |
| 5 |
x=1
| 11 |
| 20 |
(2)x-
| 3 |
| 4 |
| 9 |
| 4 |
x-
| 3 |
| 4 |
| 3 |
| 4 |
| 9 |
| 4 |
| 3 |
| 4 |
x=3;
(3)x+(
| 4 |
| 5 |
| 1 |
| 3 |
| 2 |
| 3 |
x+
| 17 |
| 15 |
| 2 |
| 3 |
x+
| 17 |
| 15 |
| 17 |
| 15 |
| 2 |
| 3 |
| 17 |
| 15 |
x=-
| 7 |
| 15 |
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