解下列的方程组,用代入消元法做..(1){X-3y=2 (2){x+y=5 (3){4x+3y=5 (4){m-n/2=2y=x 2x+y=8 x-2y=4 2m+3n=12
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![解下列的方程组,用代入消元法做..(1){X-3y=2 (2){x+y=5 (3){4x+3y=5 (4){m-n/2=2y=x 2x+y=8 x-2y=4 2m+3n=12](/uploads/image/z/3810438-54-8.jpg?t=%E8%A7%A3%E4%B8%8B%E5%88%97%E7%9A%84%E6%96%B9%E7%A8%8B%E7%BB%84%2C%E7%94%A8%E4%BB%A3%E5%85%A5%E6%B6%88%E5%85%83%E6%B3%95%E5%81%9A..%281%29%EF%BD%9BX-3y%3D2+%EF%BC%882%EF%BC%89%EF%BD%9Bx%2By%3D5+%EF%BC%883%EF%BC%89%EF%BD%9B4x%2B3y%3D5+%EF%BC%884%EF%BC%89%EF%BD%9Bm-n%2F2%3D2y%3Dx+2x%2By%3D8+x-2y%3D4+2m%2B3n%3D12)
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解下列的方程组,用代入消元法做..(1){X-3y=2 (2){x+y=5 (3){4x+3y=5 (4){m-n/2=2y=x 2x+y=8 x-2y=4 2m+3n=12
解下列的方程组,用代入消元法做..
(1){X-3y=2 (2){x+y=5 (3){4x+3y=5 (4){m-n/2=2
y=x 2x+y=8 x-2y=4 2m+3n=12
解下列的方程组,用代入消元法做..(1){X-3y=2 (2){x+y=5 (3){4x+3y=5 (4){m-n/2=2y=x 2x+y=8 x-2y=4 2m+3n=12
1、y=x= -1
2、x=3 y=2
3、y=-1,x=2
4、n=2 m=3