题目内容
求未知数x.
32:x=
:
1-20%x=
.
32:x=
| 1 |
| 3 |
| 1 |
| 4 |
1-20%x=
| 1 |
| 5 |
(1)32:x=
:
,
X=32×
,
x÷
=8÷
,
x=24;
(2)1-20%x=
,
1-20%x+20%x=
+20%x,
1=
+20%x,
1-
=
+20%x-
,
=20%x,
÷20%=20%x÷20%,
x=4.
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
x=24;
(2)1-20%x=
| 1 |
| 5 |
1-20%x+20%x=
| 1 |
| 5 |
1=
| 1 |
| 5 |
1-
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
x=4.
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