题目内容
解方程.
x+
=
x-4
=
-x=
.
x+
| 17 |
| 19 |
| 23 |
| 19 |
x-4
| 2 |
| 3 |
| 1 |
| 5 |
| 5 |
| 7 |
| 3 |
| 14 |
(1)x+
=
,
x+
-
=
-
,
x=
;
(2)x-4
=
,
x-4
+4
=
+4
,
x=4
;
(3)
-x=
,
-x+x=
+x,
+x=
,
+x-
=
-
,
x=
.
| 17 |
| 19 |
| 23 |
| 19 |
x+
| 17 |
| 19 |
| 17 |
| 19 |
| 23 |
| 19 |
| 17 |
| 19 |
x=
| 6 |
| 19 |
(2)x-4
| 2 |
| 3 |
| 1 |
| 5 |
x-4
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 5 |
| 2 |
| 3 |
x=4
| 13 |
| 15 |
(3)
| 5 |
| 7 |
| 3 |
| 14 |
| 5 |
| 7 |
| 3 |
| 14 |
| 3 |
| 14 |
| 5 |
| 7 |
| 3 |
| 14 |
| 3 |
| 14 |
| 5 |
| 7 |
| 3 |
| 14 |
x=
| 1 |
| 2 |
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