x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组

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 4x+3y=3 3x+5y=-6 用加减消元法解方程组{x/3+y/4=2 x/4+y/3=2 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{3x+2y=5 2x-3y=8 用加减消元法解方程组3x+4y=14,5x-6y=36 {x-y=3 2x+3(x-y)=11 用加减消元法解方程组 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 ｛x/3+y/4=1 x/3-y/2=1 用加减消元法解方程组 用加减消元法解方程组：x+y=4,2x-y=5