用加减消元法算 {3x-2y= -12 ,2x+3y=5
x+y/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组
4(x+2y)=12,3x=5+2y(加减消元法)
用加减消元法解方程组{3x+2y=5 2x-3y=8
用加减消元解方程 2x+3y=12 3x+4y=17
5x-3y=2,4y+2x=6用加减消元法
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 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
用加减消元法解列二元一次方程组{2x-3y+5=0 3x+2y=12
用加减消元法解下列方程组:2x+y=15 x+2y=18 5x+y=3 x+5y=2
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