若｜y+5｜+(5x+1)^2=0,求-3(2x-y)-｛7x-[6x+2y-(10x-8y)]-x-2(3x-4y)｝的值

若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值 若x²-4xy+5y²-2y+1=0,求x,y 若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值 若2x-3y=0,求5x+4y/3x-2y x^2-x+y^2+2y+5/4=0 求x^-1+y^0 3x+4y-5=0 x^2+y^2=1求x.y 已知x>0,y>0,2/x+5/y=1,求x+y最小值 (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 若|3y-2x-5|+(3x+4y-1)^2=0,求x+y {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? 已知:3x-5y=0,求x/y,x-y/y,x-y/x 若x>0,y>0,且√x(√x+√y)=3√y(√x+5√y),求2x+2√x*√y+3y/x-√x*√y+y 若/3x-2/+/y-5/=0,求x+2y-1的值 若(x+y)(x+y-1)-2=0,求x+y的值求 若2x+5y-3=0,求4^x-1*32^y的值 若实数x,y满足(x-y-5)的平方+/2x+3y+20/=0,求3x+2y+1的值 若[x-y]+[y-5]=0,求2x+y.[ ]表示绝对值的符号 x*x+y*y-2x+4y+5=0求x,