题目内容
解方程
1-
x=
=
.
1-
| 3 |
| 5 |
| 6 |
| 7 |
| 1.75 |
| 5 |
| x |
| 3 |
(1)1-
x=
,
1-
x+
x-
=
+
x-
,
=
x,
x×
=
×
,
x=
;
(2)
=
,
5x=1.75×3,
5x÷5=1.75×3÷5,
x=1.05.
| 3 |
| 5 |
| 6 |
| 7 |
1-
| 3 |
| 5 |
| 3 |
| 5 |
| 6 |
| 7 |
| 6 |
| 7 |
| 3 |
| 5 |
| 6 |
| 7 |
| 1 |
| 7 |
| 3 |
| 5 |
| 3 |
| 5 |
| 5 |
| 3 |
| 1 |
| 7 |
| 5 |
| 3 |
x=
| 5 |
| 21 |
(2)
| 1.75 |
| 5 |
| x |
| 3 |
5x=1.75×3,
5x÷5=1.75×3÷5,
x=1.05.
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