x/24+y/18=55/66 x/8+y/16=3/2 解这个方程组

24(55-x)+18x=24(55-x)+18x=16y+8(90-y) 解方程组24/(x+y) +24/(x-y) = 7/3 ,8/(x+y) +18/(x-y) = 4/3 x/24+y/18=55/66 x/8+y/16=3/2 解这个方程组 x+y=10;8x+6y=66 已知y=√(x-8)+√(8-x)+18,求代数式 (x+y)/(√x-√y)-2xy/(x√x-y√x) 的值 x+y=45,24x+18y=960 18x+6y=24 x=y x+y=18 x/12 +y/8 =20 解这些方程组 (1) 7x-2y=96 5x-3y=45 (2) 4x+2y=50 2x+3y=47 (3) 4x+2y=66 7x-3y=70(4) 11x+9y=49 13x-3y=17 (5) 2y-x=1 13x-8y=59 (6) 18x+29y=307 16x+28y=284 已知y=根号(x-8)+根号(8-x)+18,求代数式[(x+y)/(根号x+根号y)]-2xy/(x根号y-y根号x)的值 已知y=根号x-8+根号8-x+18,求根号x-根号y分之x+y-x根号y+y根号x 解方程组：2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66 解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66 x+y=24,(x+3y)24=8xy,解x.y (10x+y)-(10y+x)=18 x=8-y 6 x+-18 y=14 -8 x+14 y=5 求x y 分解因式16(x-y)的平方-24xy(y-x)=8(x-y)( ) (x/8+x/12)*3+(x/12+x/24)y=x怎么解,