Problema Solution
1.) The ten digits of a two-digit number is 4 more than the units digit. If the sum of the digit is 5 less than one-fifth of the number.Find the number.
2.) The sum of the digits of a two digit number is 9. The number with the digit interchanged is 6 times the sum of the digits. Find the original number.
3. ) The units digit of a two-digit number is four time the ten digit. When the digit are reversed, the new number is 2 less than thrice the original number. Find the original number.
thank you so much.
Answer provided by our tutors
(1) Ten digit:(x+4), unit digit: x
5(x+4+x+5)=10(x+4)+x
x = 5
So the number is 95
(2)
Ten digit:(9-x), unit digit: x
6(9-x+x)=10(9-x)+x
x = 4
So the number is 54
(3)
Ten digit:x, unit digit: 4x
2(10x+4x) = 2 + 40x+x
So x = 2
The original number is 28