题目内容
解方程
X:
|
| X÷
| 2x+30%x=9.2. |
(1)x:
=4
x=
×4
x=
;
(2)
x+15=40
x+15-15=40-15
x=25
x÷
=25÷
x=35;
(3)x÷
=
x÷
×
=
×
x=
;
(4)2x+30%x=9.2
2.3x=9.2
2.3x÷2.3=9.2÷2.3
x=4.
| 1 |
| 8 |
x=
| 1 |
| 8 |
x=
| 1 |
| 2 |
(2)
| 5 |
| 7 |
| 5 |
| 7 |
| 5 |
| 7 |
| 5 |
| 7 |
| 5 |
| 7 |
| 5 |
| 7 |
x=35;
(3)x÷
| 3 |
| 4 |
| 4 |
| 5 |
x÷
| 3 |
| 4 |
| 3 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
x=
| 3 |
| 5 |
(4)2x+30%x=9.2
2.3x=9.2
2.3x÷2.3=9.2÷2.3
x=4.
练习册系列答案
相关题目