x+y=5 2x+y=8 求x y的结果

x+y=5 2x+y=8 求x y的结果 6X+3Y=5(X+Y)求结果 x*x+2x-y*y+6y-8=0,x+y不等于2,求x-y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 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 已知x+y/y=11/8,求x-y/x+2y的值. 已知x+y=5,x-y=3,求:x^2-y^2 x^2+y^2 xy的结果 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/x=11/8,求x-y/x+2y的值 已知x^2+4y^2-2x-2x+8y+5=0,求x^2-y^2/2x^2+xy-y^2*2y-y/xy-y/(x^2+y^2/y)^2的值 int x=5; int y=2+(x+=x++,x+8,++x); printf(%d,y); 求程序的结果并解释. 已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 已知x-y=8,（x+y)(x-y)=32,求x,y的值 X+Y-8X+10Y+41=O,求X/Y-Y/X的值