Question

The difference in the digits of a two - digit number is 1 . If digits are interchanged, the new number becomes 9 more than the old number. Find the number.​

Answer 1

Answer:

Step-by-step explanation:

let the unit place BA X and 10 + b y the number is 10 y + X is the condition X + y equal 9 equation first the number interchange the unit place and tens place we X the new number is form 10 X + y according to question 10 X + y equal 10 y + X + 9 10 x minus x + y - 3 y equal 9 9 x minus 9 y equal equal 9 (x-y)=9