x-y=5.4 10y=x y=?x=?RT
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x-y=5.4 10y=x y=?x=?RT
x-y=5.4 10y=x y=?x=?
RT
x-y=5.4 10y=x y=?x=?RT
y=0.6
x=6
x-y=5.4 10y=x
10y-y=5.4
9y=5.4
y=0.6
x=10y=0.6*10=6
由题得9Y=5.4 则 Y=0.6 X=6
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
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+x+y+y+y=56
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)
(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=20,x-y=10,y=
y+y+x=10,x+y+x=8,y=?,x=?
y+10x=x+y+9 10y+x=y+10x+27
已知|x|+x+y=10 |y|+x-y=12 求 x+y=?
(x+y)/6+(x-y)/10=1,(x+y)/6-(x-y)/10=5