题目内容
求未知数Χ.
:
=Χ:
0.75Χ+
×
=1.
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 2 |
0.75Χ+
| 1 |
| 2 |
| 3 |
| 4 |
(1)
:
=x:
,
x=
×
,
x=
,
x=1;
(2)0.75x+
×
=1,
0.75x+
=1,
0.75x+
-
=1-
,
0.75x=
,
x=
÷0.75,
x=
.
| 1 |
| 3 |
| 1 |
| 6 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
| 1 |
| 6 |
x=1;
(2)0.75x+
| 1 |
| 2 |
| 3 |
| 4 |
0.75x+
| 3 |
| 8 |
0.75x+
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
0.75x=
| 5 |
| 8 |
x=
| 5 |
| 8 |
x=
| 5 |
| 6 |
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