x+y=94 8x+10y=834

(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 若x^2+y^2-8x-10y+41=0,求x/y+y/x的值 已知/x/+x+y=10,/y/+x-y=12.求x+y的值 x^2+y^2-8x+10y+41=0求(x+y)^2013 已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y X+Y=7(100X+Y)-(10Y+X)=(10Y+X)-(10X+Y) （x+2y)(x-2y)-(2y-x)(-2x-y)其中x=8,y=-8 已知实数x,y满足|x|+x+y=10、x+|y|-y=12,则x+y的值? [(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x= 二元函数f(x,y)=x+y/x-y,求f(y/x,x/y) [x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013