Question

In a two digit number, the sum of digit is 13. If number os subtracted fro the one obtained by interchanging of digits the results is 45. What is the number?

Answer 1

Hi mate !!☺


Here's your answer looking for!!
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↪let u ↔ units digit

↪let t ↔ tens digit
》
↪t + u = 13

↪t = 13 - u
》

10u + t - (10t + u) = 45

10u + t - 10t - u = 45

10u + 13 - u - 10(13- u)- u = 45

10u + 13 - u -130 + 10u -u = 45

↪18u=162

↪u=9


t =》 13 - u = 4

↪number = 49 .

$hope \: it \: helps$


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