题目内容
解方程:
3x+
=10-
5x+3=8x-3
x-
=
.
3x+
| 1 |
| 6 |
| 5 |
| 6 |
5x+3=8x-3
x-
| 5 |
| 6 |
| 1 |
| 12 |
(1)3x+
=10-
,
3x+
=
,
3x+
-
=
-
,
3x=9,
3x÷3=9÷3,
x=3;
(2)5x+3=8x-3,
5x+3-5x=8x-3-5x,
3=3x-3,
3+3=3x-3+3,
3x÷3=6÷3,
x=2;
(3)x-
=
,
x-
+
=
+
,
x=
.
| 1 |
| 6 |
| 5 |
| 6 |
3x+
| 1 |
| 6 |
| 55 |
| 6 |
3x+
| 1 |
| 6 |
| 1 |
| 6 |
| 55 |
| 6 |
| 1 |
| 6 |
3x=9,
3x÷3=9÷3,
x=3;
(2)5x+3=8x-3,
5x+3-5x=8x-3-5x,
3=3x-3,
3+3=3x-3+3,
3x÷3=6÷3,
x=2;
(3)x-
| 5 |
| 6 |
| 1 |
| 12 |
x-
| 5 |
| 6 |
| 5 |
| 6 |
| 1 |
| 12 |
| 5 |
| 6 |
x=
| 11 |
| 12 |
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