Let P(x)=5/3-6x-9x^2a n dQ(y)=-4y^2+4y+(...

Let `P(x)=5/3-6x-9x^2a n dQ(y)=-4y^2+4y+(13)/2dot` if there exists unique pair of real numbers `(x , y)` such that `P(x)Q(y)=20` , then the value of `(6x+10 y)` is _____.

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