题目内容
求未知数x的值.
5X-4.5×2=0.
5
:4=X:
.
5X-4.5×2=0.
5
| 1 |
| 3 |
| 4 |
| 5 |
(1)5X-4.5×2=0,
5X-9=0,
5X-9+9=0+9,
5X=9,
5X÷5=9÷5,
X=
;
(2)5
:4=X:
,
4X=5
×
,
4X÷4=
×
÷4,
X=
×
×
,
X=
.
5X-9=0,
5X-9+9=0+9,
5X=9,
5X÷5=9÷5,
X=
| 9 |
| 5 |
(2)5
| 1 |
| 3 |
| 4 |
| 5 |
4X=5
| 1 |
| 3 |
| 4 |
| 5 |
4X÷4=
| 16 |
| 3 |
| 4 |
| 5 |
X=
| 16 |
| 3 |
| 4 |
| 5 |
| 1 |
| 4 |
X=
| 16 |
| 15 |
练习册系列答案
相关题目