题目内容
解下列方程.
|
| 13-
|
(1)
X+1=
,
X+1-1=
-1,
x÷
=
÷
,
x=
;
(2)
X+
X=
,
x=
,
x÷
=
÷
,
x=
;
(3)13-
X=10,
13-
X+
x=10+
x,
13-10=10+
x-10,
3÷
=
x÷
,
x=8.
| 3 |
| 4 |
| 13 |
| 8 |
| 3 |
| 4 |
| 13 |
| 8 |
| 3 |
| 4 |
| 3 |
| 4 |
| 5 |
| 8 |
| 3 |
| 4 |
x=
| 5 |
| 6 |
(2)
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
| 7 |
| 6 |
| 1 |
| 2 |
| 7 |
| 6 |
| 7 |
| 6 |
| 1 |
| 2 |
| 7 |
| 6 |
x=
| 3 |
| 7 |
(3)13-
| 3 |
| 8 |
13-
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
13-10=10+
| 3 |
| 8 |
3÷
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
x=8.
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