SOLUTION: The sum of the digits of a certain two-digit number is 7. Reversing it's digits increases the number by 9. What is the number?

Question 953173: The sum of the digits of a certain two-digit number is 7. Reversing it's digits increases the number by 9. What is the number?
Found 2 solutions by genius man, adamhen894:
Answer by genius man(2) (Show Source): You can put this solution on YOUR website!
The number is 34
Answer by adamhen894(15) (Show Source): You can put this solution on YOUR website!
let
x = tens digit
y = ones digit
sum of digits of two-digits number is 7
x+y=7
reversing its digits increases the number by 9
10y+x=(10x+y)+9
now you got a system of equation, you can solve for two variables.
the answer x=3 y=4
you can find two number and test it out, it will be more easy to understand. (ex. x= 3 y=4)
i would lvoe to hear alternative ways to solve it, gmail me if you have one
adamchen894@gmail.com
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