题目内容
X-
| X+
| ||||||||
X-
| X+
|
(1)x-
x=12,
(1-
)x=12,
x÷
=12÷
,
x=24;
(2)x+
x=
,
(1+
)x=
,
x=
,
x÷
=
÷
,
x=
;
(3)x-
x=
,
(1-
)x=
,
x÷
=
÷
,
x=
;
(4)x+
x=
,
(1+
)x=
,
x÷
=
÷
,
x=
.
| 1 |
| 2 |
(1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
x=24;
(2)x+
| 2 |
| 3 |
| 5 |
| 21 |
(1+
| 2 |
| 3 |
| 5 |
| 21 |
| 5 |
| 3 |
| 5 |
| 21 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 21 |
| 5 |
| 3 |
x=
| 1 |
| 7 |
(3)x-
| 3 |
| 5 |
| 4 |
| 15 |
(1-
| 3 |
| 5 |
| 4 |
| 15 |
| 2 |
| 5 |
| 2 |
| 5 |
| 4 |
| 15 |
| 2 |
| 5 |
x=
| 2 |
| 3 |
(4)x+
| 4 |
| 7 |
| 33 |
| 49 |
(1+
| 4 |
| 7 |
| 33 |
| 49 |
| 11 |
| 7 |
| 11 |
| 7 |
| 33 |
| 49 |
| 11 |
| 7 |
x=
| 3 |
| 7 |
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