题目内容
求未知数x
①
| ②4:
| ③
|
①
x-25%x=4,
x=4,
x÷
=4÷
,
x=32;
②4:
=x:
,
x=
,
x÷
=
÷
,
x=1;
③
=
,
1.2x=3,
1.2x÷1.2=3÷1.2,
x=2.5.
| 3 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
x=32;
②4:
| 2 |
| 3 |
| 1 |
| 6 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
x=1;
③
| 1.2 |
| 7.5 |
| 0.4 |
| x |
1.2x=3,
1.2x÷1.2=3÷1.2,
x=2.5.
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