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The sum of the digits of a two number is 6. The number with the digits interchanged is 3 times the tens digit of the original number. Find the original number.
9 years ago

Answers

Reiny
let the tens digit be x
let the unit digit by y
x+y=6 ---> y = 6-x

original number = 10x + y
number reversed = 10y + x

10y + x = 3x
10y = 2x
x = 5y
then y = 6 - 5y
6y=6
y=1
and x=5(1) = 5

the original number is 51
9 years ago

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