2x+3y=6 4y-6x=3
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x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
解二元一次方程组:3(x+y)-4(x-y)=4,x+y/2+x-y/6+1x+y/2+x-y/6+1=1
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
把(x-y)看作一个整体,化解:5(x-y)+2(x-y)-4(x-y)= 3(x-y)把(x-y)看作一个整体,化解:5(x-y)+2(x-y)-4(x-y)=3(x-y)²-4(x-y)+7(x-y)-6(x-y)²=
x+y/2+ x-y/2=6 2(x+y)-3x+3y=24 求X Y
{x+y=1 ,xy=-6{x(2x-3)=0,y=x²-1{(3x+4y-3)(3x+4y+3)=0,3x+2y=5{(x-y+2)(x+y)=0,x²+y²=8{(x+y)((x+y-1)=0,(x-y)(x-y-1)=0
x^2+4y^2-6x+4y+10=0,求x^4-y^4/(x+2y)(x-2y)*x+2y/xy^2+y^3除以(x^2+y^2/y)^2的值
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
解下列方程组:{x+y/2+x-y/3=6 {4(x+y)-3(x-y)=14{x+y/2+x-y/3=6{4(x+y)-3(x-y)=14