Saturday

December 20, 2014

December 20, 2014

Posted by **wan** on Saturday, March 16, 2013 at 7:14am.

- math -
**Reiny**, Saturday, March 16, 2013 at 7:48amlet the unit digit be x and the tens digit be y

then the number is 10y + x

and the number reversed would be 10x + y

but 10x + y - (10y + x) = 18

9x - 9y = 18

x-y = 2

this works for:

3,1 ---> our given case

4,2

5,3

6,4

7,5

8,6

and 9,7

check 7,5

if x=7, y = 5

the original number was 57

number reversed 75

and 75 - 57 = 18

**Answer this Question**

**Related Questions**

math - You have 2 digits, 2 numbers, reverse digits and 54 if the difference and...

math ALGEBRA - When the digits of two-digits numbers are reversed, the new ...

Math - What do the digits in the number 15 add up to? Answer 1+5=___. Using ...

maths - The product of the digits of a positive two-digit number exceeds the sum...

math - The sum of the digits of a two-digit number is 16. If the digits are ...

math - a number consists of two digits whose sum is 8.if 8 is added to the ...

math - the sum of the digits of a two digit number is 9. if the digits are ...

maths - a number consists of 2 digits whose sum is 8,if 18 is added to the ...

algebra - A number consists of two digits. The sum of twice the tens digit an 5 ...

algebra - The sum of the digits of a two-digit number is eleven. If the digits ...