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赵鑫 2022-08-12 20:32:32 +08:00
parent 3ae9b8ac15
commit 03ed9b16e6

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@ -28,10 +28,7 @@
解: 设鸡有$x$只, 兔有$y$只,则:
$$ \begin{cases}
x+y &= 35\\
2x+4y &= 94
\end{cases} $$
$ \begin{cases}x+y &= 35 \newline 2x+4y &= 94 \end{cases} $
$ x = 35-y $