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Question : 51 of 86

Marks: +1, -0

If

\;{9^{y} ⋅ 3^{2}(3^{-y})^{-1}-27^{y}}/{3^{3 x} ⋅ 2^{3}}=\;{1}/{27}

then

x

-y is given by;

0
$-1$
3
1 .

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