用代入消元法解方程组{3x-2y=6 {2x+3y=17
用代入消元法解方程组{3x-2y=6 {2x+3y=17
用代入法解方程组2x+3y=12,3x-4y=17代入法代入法代入法!
用代入法解方程组:y=3(x-y),x=2(x-y)
用代入消元法解二元一次方程组{x-y=3、3x-2y=5
2x-3y=-1 4x+3y=-5 用代入消元法解方程组
用代入消元法解方程组2x+3y=113x-2y=10
用代入消元法解方程组, 2x+3y=40 x-y=-5
用代入法解方程组x-y=-6,2x+3y=8.
用代入法解方程组 {x-y=3 2y+3(x-y)=11}
用代入法解下列方程组{x-y-6,2x+3y-8 {3(y-2)=x-17,2(x-1)-5y-8
用代入消元法解方程组 3(y-2)=x-17,2(x-1)=5y-8
用代入消元法解方程组{4x+2y-10=0 ① 3y+10x=17 ②