{3x+5y=3,3x-3y=11用加减消元法解

{3x+5y=3,3x-3y=11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 {x-y=3 2x+3(x-y)=11 用加减消元法解方程组 ｛x-y=3 2x+3(x-y)=11 用加减消元法解方程组 加减消元法解二元一次方程:3x+5y=21,2x-5y=-11一定是加减消元法, 用加减消元法解：4x—3y=14 5x+3y=31 用加减消元法解方程组{3x+2y=5 2x-3y=8 用加减消元法算 {3x-2y= -12 ,2x+3y=5 用加减消元法解下列方程组,x-3y=5 3x-y=-1 ｛6x-5y=8 3x-4y=5 用加减消元法做 用加减消元法解方程组{4x-5y=5,2x+3y=-25 5x-3y=2,4y+2x=6用加减消元法 用加减消元法解方程组x-3y=-8 5x-4y=25 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 3(x-1)=y+5 2(y+1)=x+1 {3x+2y=6,5x-2y=64(用加减消元法做) {3x+7y=16 { 5x-7y=8 用加减消元法 5X+4Y=140,3X+2Y=76用加减消元法求解