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দেওয়া আছে,
$x:y=7:5$, $y:z=5:7$

অর্থাৎ $x=7$, $y=5$, $z=7$

সুতরাং
$x:z=7:7$

$\therefore x:y=1:1$

অর্থাৎ $x$ ও $y$ এর মান একই হবে।
by
৯ম/১০ম শ্রেণির পাঠ্যবই এর সমাধান $35:35$ সঠিক, কারণ এখানে $x$ ও $y$ একই।

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