Math, asked by bestboysajal, 2 months ago

(c) The sum of digits of a two digit number is 7. If 9 is added to the number, the digits
mterchange their places. Find the number.​

Answers

Answered by shreekrishna35pdv8u8
1

Answer:

Step-by-step explanation:

let the once digit no. be x

tens digit no.= 7-x

original no.  = 10 (7-x) +x =70-10x+x= 70-9x

new no. = 10x+7-x=9x+7

atq

70-9x+9=9x+7

9x+9x=79-7

18x=72

x=72/18

x= 4

tens digit no.= 7-x= 7-4= 3

the number is 34

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