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赵鑫 2022-08-12 20:18:04 +08:00
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问题/鸡兔同笼.md
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@ -28,8 +28,12 @@
解： 设鸡有$x$只, 兔有$y$只，则： 解： 设鸡有$x$只, 兔有$y$只，则：
$$ \begin{cases}\begin{aligned}x+y=35\\ $$ \begin{cases}
2x+4y=94\end{aligned}\end{cases} $$ \begin{aligned}
x+y &= 35\\
2x+4y &= 94
\end{aligned}
\end{cases} $$
$ x = 35-y $ $ x = 35-y $