题目内容
解方程
X=
ⅹ÷
=
.
| 5 |
| 8 |
| 1 |
| 12 |
ⅹ÷
| 5 |
| 6 |
| 9 |
| 20 |
分析:(1)依据等式的性质,方程两边同时除以
求解,
(2)依据等式的性质,方程两边同时乘
求解.
| 5 |
| 8 |
(2)依据等式的性质,方程两边同时乘
| 5 |
| 6 |
解答:解:(1)
x=
,
x÷
=
÷
,
x=
;
(2)ⅹ÷
=
,
ⅹ÷
×
=
×
,
x=
.
| 5 |
| 8 |
| 1 |
| 12 |
| 5 |
| 8 |
| 5 |
| 8 |
| 1 |
| 12 |
| 5 |
| 8 |
x=
| 2 |
| 15 |
(2)ⅹ÷
| 5 |
| 6 |
| 9 |
| 20 |
ⅹ÷
| 5 |
| 6 |
| 5 |
| 6 |
| 9 |
| 20 |
| 5 |
| 6 |
x=
| 3 |
| 8 |
点评:本题主要考查学生依据等式的性质解方程的能力.
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