题目内容
| 解方程. X﹕
|
| ||||||||
X-
|
|
(1)x﹕
=
,
x=
×
,
x=
;
(2)
﹕x=42,
42x=
,
42x÷42=
÷42,
x=
;
(3)x-
x=24,
x=24,
x÷
=24÷
,
x=32;
(4)
x-
=
,
x-
+
=
+
,
x÷
=1÷
,
x=1.6.
| 3 |
| 4 |
| 5 |
| 6 |
x=
| 3 |
| 4 |
| 5 |
| 6 |
x=
| 5 |
| 8 |
(2)
| 21 |
| 25 |
42x=
| 21 |
| 25 |
42x÷42=
| 21 |
| 25 |
x=
| 1 |
| 50 |
(3)x-
| 1 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
x=32;
(4)
| 5 |
| 8 |
| 3 |
| 5 |
| 2 |
| 5 |
| 5 |
| 8 |
| 3 |
| 5 |
| 3 |
| 5 |
| 2 |
| 5 |
| 3 |
| 5 |
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
x=1.6.
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