题目内容
解方程:
|
95-60%χ=35 | ||||||||
4χ-
|
3÷
|
分析:(1)先把左边计算出来,得到
x=
,再利用等式的性质两边同时除以
,即可解答;
(2)根据等式的性质,先把两边同时加上
x,得出35+
x=95,根据等式的性质,先把两边同时减去35得出
x=60,再利用等式的性质两边同时除以
,即可解答;
(3)根据等式的性质,两边同时加上
得出4χ=1,再利用等式的性质两边同时除以4,即可解答;
(4)根据等式的基本性质,两边同时
x得出
x=3,再利用等式的性质两边同时除以
,即可解答.
| 1 |
| 6 |
| 5 |
| 6 |
| 1 |
| 6 |
(2)根据等式的性质,先把两边同时加上
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
(3)根据等式的性质,两边同时加上
| 1 |
| 3 |
(4)根据等式的基本性质,两边同时
| 1 |
| 3 |
| 1 |
| 9 |
| 1 |
| 9 |
解答:解:
x-
x=
,
x=
,
x÷
=
÷
,
x=5;
(2)95-60%χ=35,
95-
x+
x=35+
x,
35+
x=95,
35+
x-35=95-35,
x=60,
x÷
=60÷
,
x=100;
(3)4x-
=
,
4x-
+
=
+
,
4x=1,
4x÷4=1÷4,
x=
;
(4)3÷
x=
,
3÷
x×
x=
×
x,
x=3,
x÷
=3÷
,
x=27.
| 1 |
| 2 |
| 1 |
| 3 |
| 5 |
| 6 |
| 1 |
| 6 |
| 5 |
| 6 |
| 1 |
| 6 |
| 1 |
| 6 |
| 5 |
| 6 |
| 1 |
| 6 |
x=5;
(2)95-60%χ=35,
95-
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
35+
| 3 |
| 5 |
35+
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
x=100;
(3)4x-
| 1 |
| 3 |
| 2 |
| 3 |
4x-
| 1 |
| 3 |
| 1 |
| 3 |
| 2 |
| 3 |
| 1 |
| 3 |
4x=1,
4x÷4=1÷4,
x=
| 1 |
| 4 |
(4)3÷
| 1 |
| 3 |
| 1 |
| 3 |
3÷
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 9 |
| 1 |
| 9 |
| 1 |
| 9 |
| 1 |
| 9 |
x=27.
点评:此题考查了利用等式的性质解方程的方法的灵活应用.
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