Question

If
$\frac{4 {}^{x} }{ {2}^{x + y} } = 8$
and
$\frac{ {9}^{x + y} }{ {3}^{5y} } = 243$
find the value of
$x - y$


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Answer 1

I don't know because my class is 7please ans the question 1.1 no.4