用加减消元法解方程组 3(x-1)=y+5 2(y+1)=x+1
用加减消元法解方程组 3(x-1)=y+5 2(y+1)=x+1
{x/3+y/4=1 x/3-y/2=1 用加减消元法解方程组
用加减消元法解二元一次方程组:①[(x+y)/2]+[(x-y)/3]=5②[(x+y)/2]+[(x-y)/3]=-1
加减消元法解方程组3x-2y=54x+3y=1
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/2+x-y/3=6,4(x+y)-5(x-y)=2用加减消元法解方程组
用加减消元法解下列方程组 3x-2y=-1 3x-4y=-5
用加减消元法解个二元一次方程组 :{2x-5y=7 ① {2x+3y= -1 ②
解方程组:2x-3y=1 4x+7y=5(用加减消元法)
用加减消元法解方程组{3x+2y=5 2x-3y=8
用加减消元法解方程组{4x-5y=5,2x+3y=-25