题目内容
解方程.
(1)
+X=2
(2)
-X=
(3)X-(
+
)=
.
(1)
| 6 |
| 7 |
(2)
| 4 |
| 5 |
| 3 |
| 4 |
(3)X-(
| 1 |
| 3 |
| 3 |
| 4 |
| 11 |
| 12 |
(1)
+x=2,
+x-
=2-
,
x=1
;
(2)
-x=
,
-x+x=
+x,
-
=
+x-
,
x=
;
(3)x-(
+
)=
,
x-
=
,
x-
+
=
+
,
x=2.
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
| 7 |
| 6 |
| 7 |
x=1
| 1 |
| 7 |
(2)
| 4 |
| 5 |
| 3 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
x=
| 1 |
| 20 |
(3)x-(
| 1 |
| 3 |
| 3 |
| 4 |
| 11 |
| 12 |
x-
| 13 |
| 12 |
| 11 |
| 12 |
x-
| 13 |
| 12 |
| 13 |
| 12 |
| 11 |
| 12 |
| 13 |
| 12 |
x=2.
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