作业帮x-y=8 45/x=36/y x=?y=?
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x-y=8 45/x=36/y x=?y=?
x-y=8 45/x=36/y x=?y=?
x-y=8 45/x=36/y x=?y=?
由X-Y=8 得 X=8+Y
所以45/X=36/Y
45/8+Y=36/Y
45Y=36(8+Y)
45Y-36Y=288
Y=32
X=40
x-y=8 x=8-y 带入45/x=36/y X= 40/9 Y= 32/9
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简 x / y(x+y) - y / x(x+y) =
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
Y+X+X=36 Y-X-X=8 X=?Y=?
若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y＝
x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=?
x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=?
y=x(x
x+x+x+y=52 y+y+y+x=36求x
x-y=8 45/x=36/y x=?y=?
x+x+x+x+y+y+y=56
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
(x+y)/y=8/3则x/y=__ y/x-y=___
(x+y)/y=8/3则x/y=__ y/x-y=___
Y-X=45 (85%Y-X)×8=(Y-35-X)×12 Y-X=45 (85%Y-X)×8=(Y-35-X)×12
x+x+x+y+y=6.4 y+y+y+x+x=7.1 怎么算?
二元函数f(x,y)=x+y/x-y,求f(y/x,x/y)
x-y/x+y=(x-y)²/x²-y²（x≠y)