若x-3y+3=0,求2^x÷4^y×8

已知x^2-8x+y^2-y+16又1/4=0,求[(x+y)(x-y)-(x+y)^2-2y(x-3y)]÷4y的值 若2x-3y=0,求5x+4y/3x-2y 已知x-y=1,求[(x+2y)²+(2x+y)(x-4y)-3(x+y)(x-y)]÷y的值 若x-3y+3=0,求2^x÷4^y×8 若x+y^2-8y-6y+25=0,试求3x+4y的值xiexie! 若x^2-4x+y^2-10y+29=0,求x^2y^2+2x^3y^2+x^4y^2的值 x-2y+3=0 求x^2-(4y+1)x+4y^2+8y 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 已知:3x-5y=0,求x/y,x-y/y,x-y/x 已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y 已知(3x+1)(3x-3)-3x+2)^2=-7,(y+7)(y-7)-y(y-7)=0,求8y^2-5y(-y+3x)+4y(-4y-5/2x)的值 已知:3X^2+XY-2Y^2=0,求(X+Y)/(X-Y)+4XY/(Y^2-X^2)÷(X^2+2XY-3Y^2)/(X^2-8Y^2)的值... 已知4y^2+4y+1+|x-1|=0 求[(x-2y)^2-(2x+y)(2x-y)+(3x-y)(x+y)]÷（2y）的值 若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值 若根号x+y-3+绝对值xy+x+y-2=0,求x/y+y/x根号x+y-3+绝对值xy+x+y-2=0,求x/y+y/x 1 已知x+y/y=7/3 求x+y/x-y等于什么2 若x+4/3=y+3/2=z+8/4 且x+y+z=12 求x、y、z的值 已知2y-x=-3,求[4y(2x-y)-2x(2x-y)]/(2x-y 若x+y+3=0,求2/3-2x-2y+(-x-y)^2