题目内容
| 解方程 x÷
|
| x+
|
(1)x÷
=
,
x÷
×
=
×
,
x=
;
(2)
x÷
=12,
x÷
×
=12×
,
x=3,
x÷
=3÷
,
x=
;
(3)x+
x=25,
x(1+
)=25,
x=25,
x÷
=25÷
,
x=20.
| 4 |
| 5 |
| 15 |
| 28 |
x÷
| 4 |
| 5 |
| 4 |
| 5 |
| 15 |
| 28 |
| 4 |
| 5 |
x=
| 3 |
| 7 |
(2)
| 2 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
x=
| 9 |
| 2 |
(3)x+
| 1 |
| 4 |
x(1+
| 1 |
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
x=20.
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