题目内容
解方程:
4+0.5x=30;
:x=4:3;
x+
x=
.
4+0.5x=30;
| 4 |
| 5 |
| 2 |
| 3 |
| 1 |
| 5 |
| 4 |
| 15 |
(1)4+0.5x=30,
4+0.5x-4=30-4,
0.5X=26,
0.5X÷0.5=26÷0.5,
X=52;
(2)
:x=4:3,
4X=
×3,
4X=
,
4X÷4=
÷4,
X=
;
(3)
x+
x=
,
X=
,
X÷
=
÷
,
X=
.
4+0.5x-4=30-4,
0.5X=26,
0.5X÷0.5=26÷0.5,
X=52;
(2)
| 4 |
| 5 |
4X=
| 4 |
| 5 |
4X=
| 12 |
| 5 |
4X÷4=
| 12 |
| 5 |
X=
| 3 |
| 5 |
(3)
| 2 |
| 3 |
| 1 |
| 5 |
| 4 |
| 15 |
| 13 |
| 15 |
| 4 |
| 15 |
| 13 |
| 15 |
| 13 |
| 15 |
| 4 |
| 15 |
| 13 |
| 15 |
X=
| 4 |
| 13 |
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