题目内容
解方程
(1)
| (2)Χ-
| (3)
|
(1)
+x=
,
+x-
=
-
,
x=
;
(2)x-
=2,
x-
+
=2+
,
x=2
;
(3)
x-
x=2.4,
(
-
)x=2.4,
3x=2.4,
3x÷3=2.4÷3,
x=0.8.
| 3 |
| 8 |
| 7 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
| 7 |
| 8 |
| 3 |
| 8 |
x=
| 1 |
| 2 |
(2)x-
| 3 |
| 5 |
x-
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
x=2
| 3 |
| 5 |
(3)
| 7 |
| 2 |
| 1 |
| 2 |
(
| 7 |
| 2 |
| 1 |
| 2 |
3x=2.4,
3x÷3=2.4÷3,
x=0.8.
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