3x+5y=3,求8^X*32^Y的值

已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值 3(x-5)-8y=-x-(-0.5y)=7,求x,y的值 已知x-2y=2016,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x的值 已知x-2y=2010,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷8x的值 已知:x-2y=2009,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x 的值 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值 已知x-y=8,（x+y)(x-y)=32,求x,y的值 y=3(x-y),x=2(x-y)求x,y的值 已知|3x-y|+|x+y|=0,求x-y除以x*y的值. 已知x,y为正整数,并且x*y+x+y=71,x*x*y+x*y*y=880,求3*x*x+8*x*y+3*y*y的值 若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 若x+y分之x-y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值 若x-y分之x+y=3,求式子x+y分之5(x-y)—2（x-y）分之x+y的值 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x-y/y=8/3,求x+y/y的值 已知:3x-5y=0,求x/y,x-y/y,x-y/x 若|x|=3,|y|=5 且|x+y|=-(x+y )求x-y的值若|x|=3,|y|=5 且|x+y|=-(x+y )求y-x的值