{x/3+y/4=1 x/3-y/2=1 用加减消元法解方程组
{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 3(x-1)=y+5 2(y+1)=x+1
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{x/3+y/4=2 x/4+y/3=2
加减消元法解方程组3x-2y=54x+3y=1
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{4x-5y=5,2x+3y=-25
加减消元法解方程组:{3x-7y=1 {5x-4y=17
加减消元法解方程组:4x-y=9,3x+5y=1
{x-y=3 2x+3(x-y)=11 用加减消元法解方程组
用加减消元法解二元一次方程组:①[(x+y)/2]+[(x-y)/3]=5②[(x+y)/2]+[(x-y)/3]=-1