21 lines
474 B
Markdown
21 lines
474 B
Markdown
# 均贫富
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```
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明明的邮票：============================= 29
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小强的邮票：========= 9
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问：明明给小强几张邮票后两个人的邮票就一样多了？
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```
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$$ a - x = b + x \qaud (a \in \Bbb{N}, b \in \Bbb{N}, a>b) $$
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## 解法1
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$ \begin{aligned} 2x &= a - b &(移项并交换等式两侧) \newline x &=\frac{a-b}{2} &(等式两侧同除以2) \end{aligned} $
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## 解法2
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$$ x = \frac{a+b}{2} - b $$
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\(x = \frac{a+b}{2} - b \)
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