题目内容
求未知数χ.
①χ-
χ=
②42:
=χ:
.
①χ-
| 3 |
| 5 |
| 6 |
| 5 |
②42:
| 3 |
| 5 |
| 5 |
| 7 |
①x-
x=
,
(1-
)x=
,
x=
,
x÷
=
÷
,
x=
×
,
x=3;
②42:
=x:
,
x=42×
,
x=30,
x÷
=30÷
,
x=30×
,
x=50.
| 3 |
| 5 |
| 6 |
| 5 |
(1-
| 3 |
| 5 |
| 6 |
| 5 |
| 2 |
| 5 |
| 6 |
| 5 |
| 2 |
| 5 |
| 2 |
| 5 |
| 6 |
| 5 |
| 2 |
| 5 |
x=
| 6 |
| 5 |
| 5 |
| 2 |
x=3;
②42:
| 3 |
| 5 |
| 5 |
| 7 |
| 3 |
| 5 |
| 5 |
| 7 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
x=30×
| 5 |
| 3 |
x=50.
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