题目内容
解方程.
x=
X+
X=
÷X=
.
| 5 |
| 12 |
| 7 |
| 8 |
X+
| 1 |
| 6 |
| 8 |
| 5 |
| 30 |
| 7 |
| 2 |
| 28 |
分析:(1)根据等式的性质,方程两边同时除以
,即可解答;
(2)先化简X+
X,再根据等式的性质,方程两边同时除以
,即可解答;
(3)根据等式的性质,方程两边同时乘x,然后再同时除以
,即可解答.
| 5 |
| 12 |
(2)先化简X+
| 1 |
| 6 |
| 7 |
| 6 |
(3)根据等式的性质,方程两边同时乘x,然后再同时除以
| 2 |
| 28 |
解答:解:(1)
x=
,
x÷
=
÷
,
x=
;
(2)X+
X=
,
X=
,
X÷
=
÷
,
x=
;
(3)
÷x=
,
÷x×x=
×x,
x=
,
x÷
=
÷
,
x=60.
| 5 |
| 12 |
| 7 |
| 8 |
| 5 |
| 12 |
| 5 |
| 12 |
| 7 |
| 8 |
| 5 |
| 12 |
x=
| 21 |
| 10 |
(2)X+
| 1 |
| 6 |
| 8 |
| 5 |
| 7 |
| 6 |
| 8 |
| 5 |
| 7 |
| 6 |
| 7 |
| 6 |
| 8 |
| 5 |
| 7 |
| 6 |
x=
| 48 |
| 35 |
(3)
| 30 |
| 7 |
| 2 |
| 28 |
| 30 |
| 7 |
| 2 |
| 28 |
| 2 |
| 28 |
| 30 |
| 7 |
| 2 |
| 28 |
| 2 |
| 28 |
| 30 |
| 7 |
| 2 |
| 28 |
x=60.
点评:本题主要考查了等式的性质,解答时要注意等号对齐.
练习册系列答案
相关题目