x/2+y/3=2 2x+3y=28怎么解
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
x-y=2y 0.2x+3y=1 这个二元一次方程怎么解?
求x+y/3+x-y/2=6 3(x+y)-2(x-y)=28方程组的解
3/x+y+2/x-y=6,3(x+y)-2(x-y)=28解这个方程组
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
x/2+y/3=2 2x+3y=28怎么解
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
2x=2x+3y+56怎么解
(3x-y)^2+(3x+y)(3x-y),x=1,y=-2
y=-x²-2x+3怎么解
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20