44x+90y=7796 44x+y=3476完整过程 .

3x+y=68 3y+x=44 x+y=17 x+x+y+y+y+y=44问x和y各是多少 3X+2Y=44,2X+3Y=46,X=( ),Y=( ) 7x+3y=44,11x+2y=61,求x,y x+x+x+y=68 x+y+y+y=44 x和y分别是多少 （x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y 已知:3x-5y=0,求x/y,x-y/y,x-y/x 推倒公式:(x+y)(x*x-3x+y*y)=x*x*x+y*y*y怎么做. x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 (x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 44x+90y=7796 44x+y=3476完整过程 . 化简 x / y(x+y) - y / x(x+y) = 化简 x-y/(y-x)^3= (x+y)(2x-3y)=? 3x+x+4y+(90+10)x=3y-(2x+y)+510y=34x x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空