X-96=Y X:Y=7:9 X多少 急呀.

X-96=Y X:Y=7:9 X多少 急呀. 因式分解(x+y)(x-y)=?急 3x+6y=35 x+y=12 x.y各等于多少 急 已知|x|=4,|y|=7,求x+y的值x的绝对值等于4,y的绝对值等于7,x+y等于多少?算式!急---- 若X-3Y=2,则7-2Y+6Y=多少?急 X+x+x+y+y=95 x+x+y+y+y=105 x,y分别为多少 x+y=12,9x+9y等于多少 (x*x+y*y)(x*x+y*y)-(x*x+y*y)=12 求x*x+y*y等于多少 x十y=240 x=y+y+y x=多少 y=多少 已知x+y=9,x-y=7则x等于多少 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 X-(X*0.17)=Y x=多少?Y已知. X+(x-y)x=253 Y等于多少 {80/(x+y) +42/(x-y) =7 40/(x+y) +70/(x-y) =7 怎么解( ⊙ o ⊙ {80/(x+y) +42/(x-y) =7 40/(x+y) +70/(x-y) =7 快 急 化简 x / y(x+y) - y / x(x+y) = x-y/3=x+y/2 2x-5y=7等于多少 x－y=4 ｜x｜+｜y｜=7 问x、y的值为多少? 把(x+y)看做是一个整体合并同类项：9(x+y)-2(x+y)-6(x+y)=多少?