化简[3X+4Y+(5×2)]÷(X+Y+2)=3.5把[3X+4Y+(5×2)]÷(X+Y+2)=3.5化为X=（ ）

化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x 化简:5(x-y)+2(x+y)-3(x-y) 化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1 (x+y)-(x-y)^3÷(x-y)(x+y)×2y化简e , 因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y) x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² [2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2 化简：(4x-3y)-[-(2x+y)+(x-y)]-5x 化简(x+y)-(2x+y/2)-(3x+y/6)-(4x+y/12)-(5x+y/20)-……-(10x+y/90) 化简5y-x/x²-y²-3x-4y/y²-x²-x+2y/x²-y². 化简【(x²+y²)-(x-y)²+2y(x-y)】÷4y [(x-2y)²+(x+y)(3x-y)-3y²]÷2x化简。 化简：[(x+2y)^2-(x+y)(3x-y)-5y^2]/2x （x+y）^6/(x+y)^4-(x-y)^5/(x-y)^3 化简 .. 化简:3(x-y)²-7(x-y)+ 2(x-y)²+5(x-y) 4x-3y/x-2y÷6y-8x/y-2x 5/4(x+y)(-x-y)^3*[-4/3(x-y)]*[-3/5(y-x)^2] 5x^3y(x-y)^3-10x^4y^3(y-x)^2因式分解