题目内容
解方程.
| x-
|
|
(1)
+3x=
,
+3x-
=
-
,
3x=
,
3x÷3=
÷3,
x=
;
(2)x-
x=12,
x=12,
x×
=12×
,
x=15;
(3)
x-
=
,
x-
+
=
+
,
x=
,
x×
=
×
,
x=
.
| 2 |
| 9 |
| 5 |
| 6 |
| 2 |
| 9 |
| 2 |
| 9 |
| 5 |
| 6 |
| 2 |
| 9 |
3x=
| 11 |
| 18 |
3x÷3=
| 11 |
| 18 |
x=
| 11 |
| 54 |
(2)x-
| 1 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 5 |
| 4 |
| 5 |
| 4 |
x=15;
(3)
| 5 |
| 12 |
| 1 |
| 3 |
| 7 |
| 24 |
| 5 |
| 12 |
| 1 |
| 3 |
| 1 |
| 3 |
| 7 |
| 24 |
| 1 |
| 3 |
| 5 |
| 12 |
| 5 |
| 8 |
| 5 |
| 12 |
| 12 |
| 5 |
| 5 |
| 8 |
| 12 |
| 5 |
x=
| 3 |
| 2 |
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