题目内容
求未知数.
X-4.8×
=20
2X-
X=
.
| 4 |
| 9 |
| 5 |
| 6 |
2X-
| 4 |
| 3 |
| 1 |
| 2 |
(1)
X-4.8×
=20
X-4=20
X-4+4=20+4
X=24
X×
=24×
X=54;
(2)2X-
X=
X=
X×
=
×
X=
.
| 4 |
| 9 |
| 5 |
| 6 |
| 4 |
| 9 |
| 4 |
| 9 |
| 4 |
| 9 |
| 4 |
| 9 |
| 9 |
| 4 |
| 9 |
| 4 |
X=54;
(2)2X-
| 4 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
| 3 |
| 2 |
| 1 |
| 2 |
| 3 |
| 2 |
X=
| 3 |
| 4 |
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