已知x-3y=-3,求5-x+3y的值.
已知|3x-y|+|x+y|=0,求x-y除以x*y的值.
已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值
已知3x-2y/x+y=5/3求x;y的值
已知|x-3|+(y-x-5)2=0,求x、y的值.
已知:x-y=1,x+y=-7,求代数式3(x+y)+20(x-y)-5的值
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 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=2012,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷8x的值
已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x的值.
已知X/Y=5/3,求X/(X+Y)+X/(X-Y)-Y*2/(X*2-Y*2)的值.
已知XY.Y=-3,求-XY(X.X.X.Y.Y.Y.Y.Y.Y.Y-3.X.X.Y.Y.Y.Y.Y-Y)的值.(过程完