题目内容
解方程:
X=21
÷X=
X+
X=
.
| 3 |
| 8 |
| 30 |
| 7 |
| 1 |
| 14 |
| 1 |
| 6 |
| 8 |
| 5 |
(1)
x=21,
x×
=21×
,
x=56;
(2)
÷x=
,
÷x×x=
×x,
×x=
,
x×14=
×14,
x=60;
(3)x+
x=
,
x=
,
x×
=
×
,
x=
.
| 3 |
| 8 |
| 3 |
| 8 |
| 8 |
| 3 |
| 8 |
| 3 |
x=56;
(2)
| 30 |
| 7 |
| 1 |
| 14 |
| 30 |
| 7 |
| 1 |
| 14 |
| 1 |
| 14 |
| 30 |
| 7 |
| 1 |
| 14 |
| 30 |
| 7 |
x=60;
(3)x+
| 1 |
| 6 |
| 8 |
| 5 |
| 7 |
| 6 |
| 8 |
| 5 |
| 7 |
| 6 |
| 6 |
| 7 |
| 8 |
| 5 |
| 6 |
| 7 |
x=
| 48 |
| 35 |
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