{x/2+y/3=1,x+y=3,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/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=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
3x+2y=9 3x-2y=3 用加减消元法解方程组
用加减消元法解方程组{2x+3y=-2 3x-2y=10
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 3x+2y=22 2x-3y=40
用加减消元法解方程组:x+y=3,x-2y=-3
加减消元法解方程组3x-2y=54x+3y=1