x乘以Y=x乘以(1-10%)乘以Y+x乘以(1-10%)乘以2 等于多少啊

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x乘以Y=x乘以(1-10%)乘以Y+x乘以(1-10%)乘以2 等于多少啊
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x乘以Y=x乘以(1-10%)乘以Y+x乘以(1-10%)乘以2 等于多少啊
x乘以Y=x乘以(1-10%)乘以Y+x乘以(1-10%)乘以2 等于多少啊

x乘以Y=x乘以(1-10%)乘以Y+x乘以(1-10%)乘以2 等于多少啊
x*y=x*(1-10%)*y*x*(1-10%)*2
xy=162%x^2*y
y=162%xy
162%x=1
x=50/81

X*Y=X*(1-10%)*Y+X(1-10%)*2
解: X*Y=(1-10%)*(XY+2X)
X*Y=0.9XY+1.8X
0.1X*Y=1.8X
Y=18
X=1