题目内容
解方程:
1-
| X+20%X=40. |
(1)1-
X=
,
1-
X+
x=
+
x,
1-
=
+
x-
,
=
x,
÷
=
x÷
,
x=1
;
(2)X+20%X=40,
120%x=40,
120%x÷120%=40÷120%,
x=33
.
| 2 |
| 5 |
| 1 |
| 4 |
1-
| 2 |
| 5 |
| 2 |
| 5 |
| 1 |
| 4 |
| 2 |
| 5 |
1-
| 1 |
| 4 |
| 1 |
| 4 |
| 2 |
| 5 |
| 1 |
| 4 |
| 3 |
| 4 |
| 2 |
| 5 |
| 3 |
| 4 |
| 2 |
| 5 |
| 2 |
| 5 |
| 2 |
| 5 |
x=1
| 7 |
| 8 |
(2)X+20%X=40,
120%x=40,
120%x÷120%=40÷120%,
x=33
| 1 |
| 3 |
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