化简:3xy-3(4yx-2x)+(2xy-2x)
已知x-y=4xy,则2x+3xy-2yx-2xy-y
xy-3xy+2yx-yx
3xy-3xy-xy+2yx
3xy+xy+2x²y+yx²+3x²y等于多少
已知y=3xy+x,求代数式2x+3xy−2yx−2xy−y
已知代数式3-2xy+3yx^2+nxy-4x^2y中不含XY项,求N的值
已知3x2+xy-2y2=0,求(x+yx-y+4xyy
已知1x-1y=3,则分式2x+3xy-2yx-2xy-y的值为( )
已知:y=1−8x+8x−1+12,则代数式xy+yx+2-xy+yx−2的值为( )
3x^2y-3xy^2+6yx^2-9y^2x
实数x、y、z满足x=6-3yx+3y-2xy+2z
化简!1、(x^2-xy)+xy+y^2 2、3(x^2-xy)-xy+y^2