x-y=4,2x+y+5用加减消元法解
x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组
用加减消元法解方程组{4x-5y=5,2x+3y=-25
用加减消元法解方程组:x+y=4,2x-y=5
x-y=4,2x+y+5用加减消元法解
6x-4y=37 3x+4y=-5 用加减消元法解方程组
用加减消元法解方程组{x/3+y/4=2 x/4+y/3=2
用加减消元法解方程组{3x+2y=5 2x-3y=8
用加减消元法解方程组3x+4y=14,5x-6y=36
用加减消元法解方程组 4x+3y=3 3x+5y=-6
2x=-3y=4x-2-y+10,用加减消元法解方程组
用加减消元法解方程组{2X+3Y=8.7{4X+2Y=12.2
用加减消元法解方程组 3(x-1)=y+5 2(y+1)=x+1