2022-08-12 06:30:19 +00:00
|
|
|
# 均贫富
|
|
|
|
|
|
|
|
|
|
```
|
2022-08-12 10:14:12 +00:00
|
|
|
明明的邮票：============================= 29
|
|
|
|
|
小强的邮票：========= 9
|
2022-08-12 06:30:19 +00:00
|
|
|
```
|
2022-08-12 10:14:12 +00:00
|
|
|
|
2022-08-12 12:29:05 +00:00
|
|
|
$ a - x = b + x \space (a \in \Bbb{N}, b \in \Bbb{N}, a>b) $
|
2022-08-12 06:30:19 +00:00
|
|
|
|
|
|
|
|
## 解法1
|
|
|
|
|
|
2022-08-12 10:14:12 +00:00
|
|
|
$ 2x = a - b \space (移项并交换等式两侧)$
|
2022-08-12 06:30:19 +00:00
|
|
|
|
2022-08-12 10:14:12 +00:00
|
|
|
$ x=\frac{a-b}{2} \space (等式两侧同除以2)$
|
2022-08-12 06:30:19 +00:00
|
|
|
|
|
|
|
|
## 解法2
|
|
|
|
|
|
|
|
|
|
$x=\frac{a+b}{2}-b$
|
