题目内容
解方程
x+
x=
x÷
+
=
.
x+
| 7 |
| 9 |
| 4 |
| 3 |
x÷
| 7 |
| 5 |
| 1 |
| 5 |
| 4 |
| 5 |
分析:(1)先化简,再根据等式的性质,在方程两边同时乘上
求解,
(2)根据等式的性质,在方程两边同时减去
,再乘上
求解.
| 9 |
| 16 |
(2)根据等式的性质,在方程两边同时减去
| 1 |
| 5 |
| 7 |
| 5 |
解答:解:(1)x+
x=
,
x=
,
x×
=
×
,
x=
;
(2)x÷
+
=
,
x÷
+
-
=
-
,
x÷
×
=
×
,
x=
.
| 7 |
| 9 |
| 4 |
| 3 |
| 16 |
| 9 |
| 4 |
| 3 |
| 16 |
| 9 |
| 9 |
| 16 |
| 4 |
| 3 |
| 9 |
| 16 |
x=
| 3 |
| 4 |
(2)x÷
| 7 |
| 5 |
| 1 |
| 5 |
| 4 |
| 5 |
x÷
| 7 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 4 |
| 5 |
| 1 |
| 5 |
x÷
| 7 |
| 5 |
| 7 |
| 5 |
| 3 |
| 5 |
| 7 |
| 5 |
x=
| 21 |
| 25 |
点评:本题主要考查了学生根据等式的性质解方程的能力,注意等号对齐.
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