题目内容
求未知数
6.5+3x=15.5
x+
=
.
6.5+3x=15.5
x+
| 3 |
| 4 |
| 8 |
| 9 |
(1)6.5+3x=15.5,
6.5-6.5+3x=15.5-6.5,
3x=9,
3x÷3=9÷3,
x=3;
(2)X+
=
,
X+
-
=
-
,
X=
-
,
X=
.
6.5-6.5+3x=15.5-6.5,
3x=9,
3x÷3=9÷3,
x=3;
(2)X+
| 3 |
| 4 |
| 8 |
| 9 |
X+
| 3 |
| 4 |
| 3 |
| 4 |
| 8 |
| 9 |
| 3 |
| 4 |
X=
| 32 |
| 36 |
| 27 |
| 36 |
X=
| 5 |
| 36 |
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