Think of a number say $n$ and add $9$ to it . The result is $16$ . What is the number $n$ ?

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Solution

Find the expression.
Think of a number say $n$ and add $9$ to it . The result is $16$ .
$n + 9 = 16 n = 16 - 9 = 7$
so, $n = 7$ .

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