题目内容
求未知数X:
5X+96=131 X:21=
:3.
5X+96=131 X:21=
| 1 |
| 2 |
(1)5X+96=131,
5X+96-96=131-96,
5X=35,
5X÷5=35÷5,
X=7;
(2)X:21=
:3,
3X=21×
,
3X÷3=21×
÷3,
X=
.
5X+96-96=131-96,
5X=35,
5X÷5=35÷5,
X=7;
(2)X:21=
| 1 |
| 2 |
3X=21×
| 1 |
| 2 |
3X÷3=21×
| 1 |
| 2 |
X=
| 7 |
| 2 |
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