题目内容
求未知数X
(1)X+
X=
(2)
:X=5:16.
(1)X+
| 7 |
| 9 |
| 4 |
| 3 |
(2)
| 1 |
| 2 |
(1)X+
X=
,
(1+
)X=
,
X=
,
X×
=
×
,
X=
;
(2)
:X=5:16,
5X=
×16,
5X÷5=8÷5,
X=1.6.
| 7 |
| 9 |
| 4 |
| 3 |
(1+
| 7 |
| 9 |
| 4 |
| 3 |
| 16 |
| 9 |
| 4 |
| 3 |
| 16 |
| 9 |
| 9 |
| 16 |
| 4 |
| 3 |
| 9 |
| 16 |
X=
| 3 |
| 4 |
(2)
| 1 |
| 2 |
5X=
| 1 |
| 2 |
5X÷5=8÷5,
X=1.6.
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