题目内容
解方程
①3Χ-
Χ=
②Χ:8=
:
.
①3Χ-
| 3 |
| 4 |
| 18 |
| 19 |
| 3 |
| 4 |
| 1 |
| 5 |
①3X-
X=
,
(3-
)X=
,
X=
,
X×
=
×
,
X=
;
②Χ:8=
:
,
X=8×
,
X=6,
X×5=6×5,
X=30.
| 3 |
| 4 |
| 18 |
| 19 |
(3-
| 3 |
| 4 |
| 18 |
| 19 |
| 9 |
| 4 |
| 18 |
| 19 |
| 9 |
| 4 |
| 4 |
| 9 |
| 18 |
| 19 |
| 4 |
| 9 |
X=
| 8 |
| 19 |
②Χ:8=
| 3 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
| 3 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
X=30.
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