题目内容
解方程
(1)
|
(2)X+
|
(3)
|
(4)X÷
|
分析:(1)依据等式的性质,方程两边同时除以
求解;
(2)先化简方程是
x=15,再依据等式的性质,方程两边同时除以
求解.
(3)先化简方程是
x=
,再依据等式的性质,方程两边同时除以
求解.
(4)依据等式的性质,方程两边同时乘
,再进行计算求解.
| 3 |
| 5 |
(2)先化简方程是
| 5 |
| 4 |
| 5 |
| 4 |
(3)先化简方程是
| 8 |
| 9 |
| 8 |
| 153 |
| 8 |
| 9 |
(4)依据等式的性质,方程两边同时乘
| 6 |
| 35 |
解答:解:(1)
x=
,
x÷
=
÷
,
x=
;
(2)(2)x+
x=15,
x=15,
x÷
=15÷
,
x=12;
(3)
x=
×
,
x÷
=
÷
,
x=
;
(4)x÷
=
÷
,
x÷
×
=
×
×
.
x=
.
| 3 |
| 5 |
| 12 |
| 25 |
| 3 |
| 5 |
| 3 |
| 5 |
| 12 |
| 25 |
| 3 |
| 5 |
x=
| 4 |
| 5 |
(2)(2)x+
| 1 |
| 4 |
| 3 |
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
x=12;
(3)
| 8 |
| 9 |
| 1 |
| 6 |
| 16 |
| 51 |
| 8 |
| 9 |
| 8 |
| 9 |
| 8 |
| 153 |
| 8 |
| 9 |
x=
| 1 |
| 17 |
(4)x÷
| 6 |
| 35 |
| 26 |
| 45 |
| 13 |
| 25 |
x÷
| 6 |
| 35 |
| 6 |
| 35 |
| 26 |
| 45 |
| 25 |
| 13 |
| 6 |
| 35 |
x=
| 4 |
| 21 |
点评:本题主要考查学生依据等式的性质解方程的能力,解答时注意对齐等号.
练习册系列答案
相关题目