题目内容
χ-
=
χ+
χ=1
.
| 1 |
| 5 |
| 4 |
| 5 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 6 |
分析:(1)题根据等式的性质,方程两边同时加上
来解;
(2)题先化简,再根据等式的性质,方程两边同时除以
来解.
| 1 |
| 5 |
(2)题先化简,再根据等式的性质,方程两边同时除以
| 7 |
| 12 |
解答:解:(1)x-
=
x-
+
=
+
,
x=1;
(2)
x+
x=1
x=
,
x÷
=
÷
,
x=2.
| 1 |
| 5 |
| 4 |
| 5 |
x-
| 1 |
| 5 |
| 1 |
| 5 |
| 4 |
| 5 |
| 1 |
| 5 |
x=1;
(2)
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 6 |
| 7 |
| 12 |
| 7 |
| 6 |
| 7 |
| 12 |
| 7 |
| 12 |
| 7 |
| 6 |
| 7 |
| 12 |
x=2.
点评:利用等式的性质来解,注意等号对齐.
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