题目内容
解方程.
(1)
x=
(2)x×(
+
)=
.
(1)
| 7 |
| 8 |
| 11 |
| 16 |
(2)x×(
| 3 |
| 4 |
| 2 |
| 3 |
| 7 |
| 24 |
分析:(1)根据等式的性质,两边同乘
即可;
(2)先求出
+
=
,然后根据等式的性质,两边同乘
即可.
| 8 |
| 7 |
(2)先求出
| 3 |
| 4 |
| 2 |
| 3 |
| 17 |
| 12 |
| 12 |
| 17 |
解答:解:(1)
x=
,
x×
=
×
,
x=
;
(2)x×(
+
)=
,
x×
=
,
x×
×
=
×
,
x=
.
| 7 |
| 8 |
| 11 |
| 16 |
| 7 |
| 8 |
| 8 |
| 7 |
| 11 |
| 16 |
| 8 |
| 7 |
x=
| 11 |
| 14 |
(2)x×(
| 3 |
| 4 |
| 2 |
| 3 |
| 7 |
| 24 |
x×
| 17 |
| 12 |
| 7 |
| 24 |
x×
| 17 |
| 12 |
| 12 |
| 17 |
| 7 |
| 24 |
| 12 |
| 17 |
x=
| 7 |
| 34 |
点评:此题考查了根据等式的性质解方程,即等式两边同加、同减、同乘或同除以一个数(0除外),等式的左右两边仍相等;注意等号上下要对齐.
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