Question

plzz answer the question no 4

Answer 1

let the unit place digit be x
let tens place digit be y
then the number is 10y + X
number obtained by reversing digit is 10x+ y
10x+y+10y+X=121
11x+11y=121
X+y= 11. -1
x-y=7. -2
add 1 and 2
2x= 18
X= 9
substitute X=9 in 1
X+y=11
y=11-9
y=2
the number is 10y+X=10(2)+9
=29

I Hope It Is Useful.............