Math, asked by siddhu59, 1 year ago

The sum of the digits of a two digit number is 7.On reversing the digits,the new number obtain is 9 more than the original number. Find the number

Answers

Answered by LTRIPURA
8
let the units digit be x
let the tens digit be y

so the two digit no. is 10x+y

ATQ, x+y=7
or, x=7-y.....(i)

Also ATQ,

(10y+x)-(10x+y)=9
or, 10y+x-10x+y=9
or, 9y-9x=9
or, 9(y- x)=9
or, y-x=1

using equation i, we get,

y-(7-y)=1
or, y-7+y=1
or,2y =1+7=8
or, y =4

so x = 7-y=3

the no. 10x+y=34

siddhu59: Thanks very much bro
Similar questions