8x+200=5y 6x+8y=1120xy的解

【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值 {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 5X+8Y=3Y+6X 已知X*X+Y*Y+6X-8Y+25=0 求（Y/X)+(X/Y)-2=? x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y的值 若5x-4y=6,4x-5y=8,则x+y=( ),x-y=( ) 填空题 x+y/4=x-y/6=3x+12y+5/8 x= y= 3(2X+Y)+(2(2x-Y)=6 (8X+4y)-(10X-5Y)=2 8x+200=5y 6x+8y=1120xy的解 {6x+5y=8,3x=2y-5x=y= x+5y=6 6x+8y=15 求x y 6x-2y=5 8x-3y=-5 求x,y 8x+6y-4x+5y x= y= 6 x+-18 y=14 -8 x+14 y=5 求x y 已知|5x-y-8|+(7y-x+2)=0则4x+6y 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian