题目内容
解方程
(1)x-
=
(2)3.6x+24.5=31.7.
(1)x-
| 5 |
| 6 |
| 2 |
| 15 |
(2)3.6x+24.5=31.7.
(1)x-
=
,
x-
+
=
+
,
x=
+
,
x=
;
(2)3.6x+24.5=31.7,
3.6x+24.5-24.5=31.7-24.5,
3.6x=7.2,
3.6x÷3.6=7.2÷3.6,
x=2.
| 5 |
| 6 |
| 2 |
| 15 |
x-
| 5 |
| 6 |
| 5 |
| 6 |
| 2 |
| 15 |
| 5 |
| 6 |
x=
| 4 |
| 30 |
| 25 |
| 30 |
x=
| 29 |
| 30 |
(2)3.6x+24.5=31.7,
3.6x+24.5-24.5=31.7-24.5,
3.6x=7.2,
3.6x÷3.6=7.2÷3.6,
x=2.
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