题目内容
解方程
(1)
|
(2)Ⅹ+
|
(3)Ⅹ÷
|
分析:(1)根据等式的性质,两边同乘
即可;
(2)原式变为(1+
)Ⅹ=6,即
Ⅹ=6,根据等式的性质,两边同乘
即可;
(3)根据等式的性质,两边同乘
即可.
| 7 |
| 3 |
(2)原式变为(1+
| 1 |
| 5 |
| 6 |
| 5 |
| 5 |
| 6 |
(3)根据等式的性质,两边同乘
| 2 |
| 3 |
解答:解:(1)
x=
,
x×
=
×
,
x=
;
(2)Ⅹ+
Ⅹ=6,
(1+
)Ⅹ=6,
Ⅹ=6,
Ⅹ×
=6×
,
X=5;
(3)Ⅹ÷
=
,
Ⅹ÷
×
=
×
,
X=
.
| 3 |
| 7 |
| 9 |
| 14 |
| 3 |
| 7 |
| 7 |
| 3 |
| 9 |
| 14 |
| 7 |
| 3 |
x=
| 3 |
| 2 |
(2)Ⅹ+
| 1 |
| 5 |
(1+
| 1 |
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
| 5 |
| 6 |
| 5 |
| 6 |
X=5;
(3)Ⅹ÷
| 2 |
| 3 |
| 3 |
| 4 |
Ⅹ÷
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 4 |
| 2 |
| 3 |
X=
| 1 |
| 2 |
点评:在解方程时应根据等式的性质,即等式两边同加上、同减去、同乘上或同除以某一个数(0除外),等式的两边仍相等,同时注意“=”上下要对齐.
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