120/x=120/(1.5x)+1 Y
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X[X/(Y+X)+X/(X-Y)]=120/288 求X/Y
120/x=120/(1.5x)+1 Y
[3x^2-(x+y)(y-x)][2(-x-y)(y-x)+2x^2+3y^2],其中x=-2分之1,y=1.5
120/(x-y)+120/(x+y)=160/y 怎样化简成x=2y和x=-1/2y
120/(x-y)+120/(x+y)=160/y 怎样化简成x=2y和x=-1/2y 急!急!在线等!
24/x+24/y=120/x+20/y+20/y=1
x>=1,x-y
y=x-1(x
130*x+120*y=14760 x+y=117
X-Y=500 (X-300)/Y*100%=120%
150/x+120/y=30 x-y=2
160/x+120/y=130,求x,y
60x+120y=360 x、y等于?
求导 y=[x/(1+x)]^x
求解二元一次方程组120/(x+y) + 80/(x-y)=1630/(x+y) + 60/(x-y)=8120/(x+y) + 80/(x-y)=1630/(x+y) + 60/(x-y)=8
1.5(x+y)+3(x-y)=27(x+y)-3(x-y)=-62.x-y/7 - x+y/10 =1/22(x-y)-5(x+y)=3所谓细节决定成败,
y'-(1/x)y=xe^-x
x一y=120 x÷y=3 x和y分别等于几?