题目内容
解方程.
x-
=
x+
=
.
x-
| 7 |
| 6 |
| 3 |
| 4 |
| 5 |
| 8 |
| 1 |
| 3 |
| 4 |
| 7 |
分析:(1)依据等式的性质,方程两边同时加
求解,
(2)依据等式的性质,方程两边同时减
,再同时除以
求解.
| 7 |
| 6 |
(2)依据等式的性质,方程两边同时减
| 1 |
| 3 |
| 5 |
| 8 |
解答:解:(1)x-
=
x-
+
=
+
x=1
;
(2)
x+
=
x+
-
=
-
x÷
=
÷
x=
.
| 7 |
| 6 |
| 3 |
| 4 |
x-
| 7 |
| 6 |
| 7 |
| 6 |
| 3 |
| 4 |
| 7 |
| 6 |
x=1
| 11 |
| 12 |
(2)
| 5 |
| 8 |
| 1 |
| 3 |
| 4 |
| 7 |
| 5 |
| 8 |
| 1 |
| 3 |
| 1 |
| 3 |
| 4 |
| 7 |
| 1 |
| 3 |
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 21 |
| 5 |
| 8 |
x=
| 8 |
| 21 |
点评:依据等式的性质解方程,是本题考查知识点,解方程时注意对齐等号.
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