题目内容
解下列方程
3x-
=
x+
x=
x÷
=
.
3x-
| 3 |
| 5 |
| 2 |
| 5 |
x+
| 1 |
| 6 |
| 14 |
| 15 |
x÷
| 4 |
| 5 |
| 15 |
| 28 |
(1)3x-
=
,
3x-
+
=
+
,
3x÷3=1÷3,
x=
;
(2)x+
x=
,
x=
,
x×
=
×
,
x=
;
(3)x÷
=
,
x÷
×
=
×
,
x=
.
| 3 |
| 5 |
| 2 |
| 5 |
3x-
| 3 |
| 5 |
| 3 |
| 5 |
| 2 |
| 5 |
| 3 |
| 5 |
3x÷3=1÷3,
x=
| 1 |
| 3 |
(2)x+
| 1 |
| 6 |
| 14 |
| 15 |
| 7 |
| 6 |
| 14 |
| 15 |
| 7 |
| 6 |
| 6 |
| 7 |
| 14 |
| 15 |
| 6 |
| 7 |
x=
| 4 |
| 5 |
(3)x÷
| 4 |
| 5 |
| 15 |
| 28 |
x÷
| 4 |
| 5 |
| 4 |
| 5 |
| 15 |
| 28 |
| 4 |
| 5 |
x=
| 3 |
| 7 |
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