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ax+by=5 bx+ay=2 解為x=4 y=3 是這個題目么? 如果是的話,直接將x=4 y=3代入可直接變成關於a和b的方程組 4a+3b=5 4b+3a=2 能直接求出a和b的值 a=2 b=-1 代入就可求得你想要的答案了
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