若(x+1)^2+4|y-6|=0,则5x+6y+4x-8y的值是

若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 若实数X,Y满足X²+Y²+4X-2Y +1=0,则X²-6X+Y²-2Y的最大值是多少 {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 若5x+3y=3x+4y=x+2y+6,则x+y=___ 若实数x,y满足x^2+y^2-4x-2y+5=0,则x+y/2x-1 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 |x-2y+1|+(x+y-5)²=0,则5x+4y= 已知|5x-y-8|+(7y-x+2)=0则4x+6y 已知x*x+4x+y*y-2y+5=0,则x*x+y*y=? 已知（x-1)2+4|y-6|=0,则5x+6y-4x+8y=? 若 (3x+4y-1)^2+|3y-2x-5|=0,则x+7y 已知4x+6y=1 若x=y 则x,y的值等于?若x+y=0 则x=?y=? 若|5x+2y-12|+（3x+2y-6）（3x+2y-6）=0,则2x+4y= 若(5X+2Y-12)(5X+2Y-12)+|3x+2y-6|=0,则2x+4y=? 若|2x-y+5|+(x+2y-4)的平方=0,则（2x-y)的三次方-（x-3y)(y-2x)的平方 若√x^2-4x+3+|y^2-5y-6|=0 且x大于y 则x+y 若｜y+5｜+(5x+1)2=0,求-3(2x-y)-｛7x-[6x+2y-(10x-8y)]-x-2(3x-4y)｝的值 若|y+5|+(5x+1)^2=0,求代数式-3(2x-y)-{7x-[6x+2y-(10x-8y)]-x-2(3x-4y)}的值