Question

what is the original number ​

Answer 1

Answer:

28 is ur ans

let the tens digit no be y and ones digit be x

$x + y = 10 \: \: \: \: \: (eq \: -1) \\ \\ 10x + y - (10y + x) = 54 \\ 9x - 9y = 54 \\ x - y = 6 \\ \\ x + y = 10 \\ x - y = 6 \\ \\ x = 8 \: \: \: \: \: \: \: y = 2 \: \: \\ \\ original \: \\ no \: will \: be \: 28$