题目内容
解方程.
①8:
=4:5
②
x-
x=
.
①8:
| 5+x |
| 4 |
②
| 6 |
| 7 |
| 3 |
| 14 |
| 27 |
| 28 |
(1)8:
=4:5,
×4=8×5,
5+x=40,
5+x-5=40-5,
x=35;
(2)
x-
x=
,
x=
,
x÷
=
÷
,
x=
×
,
x=
.
| 5+x |
| 4 |
| 5+x |
| 4 |
5+x=40,
5+x-5=40-5,
x=35;
(2)
| 6 |
| 7 |
| 3 |
| 14 |
| 27 |
| 28 |
| 9 |
| 14 |
| 27 |
| 28 |
| 9 |
| 14 |
| 9 |
| 14 |
| 27 |
| 28 |
| 9 |
| 14 |
x=
| 27 |
| 28 |
| 14 |
| 9 |
x=
| 3 |
| 2 |
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