题目内容
解方程.
5.5-x=2
| 3x+60%x=432 |
|
(1)5.5-x=2
,
5.5-x+x=2
+x,
5.5=2
+x,
5.5-2
=2
+x-2
,
x=2.75;
(1)3x+60%x=432,
3.6x=432,
3.6x÷3.6=432÷3.6,
x=120;
(3)
x-
x=1,
x=1,
x÷
=1÷
,
x=
.
| 3 |
| 4 |
5.5-x+x=2
| 3 |
| 4 |
5.5=2
| 3 |
| 4 |
5.5-2
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
x=2.75;
(1)3x+60%x=432,
3.6x=432,
3.6x÷3.6=432÷3.6,
x=120;
(3)
| 2 |
| 3 |
| 1 |
| 5 |
| 7 |
| 15 |
| 7 |
| 15 |
| 7 |
| 15 |
| 7 |
| 15 |
x=
| 15 |
| 7 |
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