题目内容
解方程.
x-(
+
)=
x+
=1+
.
x-(
| 3 |
| 2 |
| 4 |
| 1 |
| 12 |
| 11 |
x+
| 9 |
| 5 |
| 12 |
| 5 |
考点:方程的解和解方程
专题:简易方程
分析:(1)先将原方程变形为x-
=
,方程的两边同时加上
,即可得解;
(2)先将原方程变形为x+
=
,方程的两边同时减去
,即可得解.
| 11 |
| 2 |
| 12 |
| 11 |
| 11 |
| 2 |
(2)先将原方程变形为x+
| 9 |
| 5 |
| 17 |
| 5 |
| 9 |
| 5 |
解答:
解:(1)x-(
+
)=
x-
=
x-
+
=
+
x=
;
(2)x+
=1+
x+
=
x+
-
=
-
x=
.
| 3 |
| 2 |
| 4 |
| 1 |
| 12 |
| 11 |
x-
| 11 |
| 2 |
| 12 |
| 11 |
x-
| 11 |
| 2 |
| 11 |
| 2 |
| 12 |
| 11 |
| 11 |
| 2 |
x=
| 145 |
| 22 |
(2)x+
| 9 |
| 5 |
| 12 |
| 5 |
x+
| 9 |
| 5 |
| 17 |
| 5 |
x+
| 9 |
| 5 |
| 9 |
| 5 |
| 17 |
| 5 |
| 9 |
| 5 |
x=
| 8 |
| 5 |
点评:此题考查了利用等式的基本性质解方程,即“方程的两边同时加上或减去相同的数,同时乘或除以相同的数(0除外),等式仍然成立”.
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