Question

Can anyone give me the answer of fifteenth number plz

Answer 1

Let the digits be x and y
$x + y = 9 \\ then \: 10y \\ 10x + y= 10y+ x+ 45 \\ 9x - 9y = 45 \\ x - y =5 \\ x + y = 9 \\ adding \: both \: equations \\ 2x = 14 \\ x = 7 \\ y = 2 \\ no \: is72 \: or \\: 27 \\ it \: has \: two \: answers \: \\ if \: we \: take \: x \: first \: answr \: is \: differnet \: if \: we \: take \: y \: first \: then \: answer \: s \: differnt \: from \: previous \: one \\ hope \: it \: helps$
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