题目内容
解方程.
x=
+
; 50%x+
=
.
| 1 |
| 5 |
| 8 |
| 35 |
| 1 |
| 7 |
| 8 |
| 9 |
| 17 |
| 18 |
分析:(1)原式变为
x=
,根据等式的性质,两边同乘5即可;
(2)原式变为
x+
=
,根据等式的性质,两边同减去
再同乘2即可.
| 1 |
| 5 |
| 13 |
| 35 |
(2)原式变为
| 1 |
| 2 |
| 8 |
| 9 |
| 17 |
| 18 |
| 8 |
| 9 |
解答:解:(1)
x=
+
x=
x×5=
×5
x=
;
(2)50%x+
=
x+
=
x+
-
=
-
x=
x×2=
×2
x=
.
| 1 |
| 5 |
| 8 |
| 35 |
| 1 |
| 7 |
| 1 |
| 5 |
| 13 |
| 35 |
| 1 |
| 5 |
| 13 |
| 35 |
x=
| 13 |
| 7 |
(2)50%x+
| 8 |
| 9 |
| 17 |
| 18 |
| 1 |
| 2 |
| 8 |
| 9 |
| 17 |
| 18 |
| 1 |
| 2 |
| 8 |
| 9 |
| 8 |
| 9 |
| 17 |
| 18 |
| 8 |
| 9 |
| 1 |
| 2 |
| 1 |
| 18 |
| 1 |
| 2 |
| 1 |
| 18 |
x=
| 1 |
| 9 |
点评:此题考查了根据等式的性质解方程,即等式两边同加上、同减去、同乘上或同除以一个不为0的数,等式仍相等.同时注意“=”上下要对齐.
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