Question

please help me in this question

Answer 1

let

ones digit=x

tens digit=y

the no. be =10y+x

a/q

x

x+y=11.........1

10y+x=10x+y-63

10y-y+x-10x=63

9y-9x=63

-9x+9y=63............2

x+y=11

-9x+9y=63

9x+9y=99

-9x+9y=63

18y=162

y=162/18

y=9

put the value of y in eq 1

x+y=11

x+9=11

x=11-9

x=2

the no. be=10x+y

=10×2+9=20+9=29