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x/4+y/3=4/3------① 5(x-9)=6(y-2)---② 化簡1、2式得: 3x+4y=16 ------③ 5x-6y=33 ------④ ③*3+④*2得:19x=114 即得:x=6 將x=6代入③得:y=-0.5 驗證x=6、y=-0.5符合原方程組. 故x=6、y=-0.5是元方程式得解.
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