A=2XX+3XY-2X-1,B=-XX+XY-1,且3A+6B的值与x无关,试求y的值

已知A=2XX+3XY-1,B=-XX+XY-1,且3A+6B的值与X无关,求Y值 已知x(x-1)-(xx-y)=-3求xx+yy-2xy 已知x（x+1)-(xx+y)=3,求(xx+yy)/2-xy的值 x(x+1)-(xx+y)=-3,求(xx+yy)/2-xy的值 7/xx+x+1/xx-1=2/xx-x xx+2xy+yy=1 xx-2xy+yy=49 求xx+yy,xy. 已知A=2XX+3XY-2X-1,B=-XX+XY-1,且3A+6B的值与x无关,试求y的值 A=2XX+3XY-2X-1,B=-XX+XY-1,且3A+6B的值与x无关,试求y的值 已知A=2XX+3XY-2X-1,B=-(XX)+XY-1.若3A+6B的值与X无关,求Y的值 已知2x=3y,求xy/xx+yy-yy/xx-yy的值 已知xx+xy=1,xy-yy=-4,则xx+2xy-yy= 已知xy+yy=3,xx+xy=-1/2,求2xx+3xy+yy的值 已知A=2xx+3ax-2x-1,B= -xx+ax-1,且3A+6B的值不含x项,求a的值. 解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20)=5/(xx+11x-7 解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20)=5/(xx+11x-708） 一、已知A=—3XX—2XY+3X+1,B=2XX+XY—1,且2A+3B的值与X无关,求Y的值二、如果关于字母X的二次三项式-3XXX+MX-5+nxxx-x+3的值与X无关,试求M,N的值. xx-1/(x-2)(x-3)=A+B/x-2+C/x-3,求A,B,C的值 已知xx+y=5,xy=-3,则x^2y+xy^2=