5x-8=2y;2x+8=y
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
3x-2y=9 x-3y=2 x+y=5 x+2y=3 y=x 2x+y=8
(x+2y)(x-2y)-(2y-x)(-2x-y)其中x=8,y=-8
[(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x=
已知x-2y=2016,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x的值
已知x-2y=2012,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]/(8x))
已知x-2y=2012,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷8x的值
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
方程组x-2y=8,3x-4y=5,x=?,y=?
已知x+y/y=11/8,求x-y/x+2y的值.
3X+2Y=5X+2 2(3X+2Y)=2X+8 求 X Y