题目内容
解方程.
(1)5x-
=34
(2)
x-
×6=
.
(1)5x-
| 3 |
| 4 |
(2)
| 3 |
| 10 |
| 4 |
| 5 |
| 3 |
| 4 |
分析:(1)等式的两边同时加上
,然后等式的两边同时除以5即可;
(2)先计算
×6=4.8,等式的两边同时加上4.8,然后等式的两边同时除以
即可.
| 3 |
| 4 |
(2)先计算
| 4 |
| 5 |
| 3 |
| 10 |
解答:解:(1)5x-
=34
5x-
+
=34+
5x=34
5x÷5=34
÷5
x=6.95;
(2)
x-
×6=
x-4.8=
x-4.8+4.8=
+4.8
x=5.55
x÷
=5.55÷
x=18.5.
| 3 |
| 4 |
5x-
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
5x=34
| 3 |
| 4 |
5x÷5=34
| 3 |
| 4 |
x=6.95;
(2)
| 3 |
| 10 |
| 4 |
| 5 |
| 3 |
| 4 |
| 3 |
| 10 |
| 3 |
| 4 |
| 3 |
| 10 |
| 3 |
| 4 |
| 3 |
| 10 |
| 3 |
| 10 |
| 3 |
| 10 |
| 3 |
| 10 |
x=18.5.
点评:本题主要考查解方程,根据等式的性质进行解答即可.
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