Question

How do you do this
The sum of the digits of a two digit number is one third of the number. the units digit is 5 more than the tens digit. What is the number?

Answer 1

Let the digits be t (for tens) and o (for ones).

t + o = (10t + o)/3
o = t + 5
Substitute and figure out t. Then, figure out o. Then, the number.

Answer 2

I dont get what to do in the 10t+o/3

Answer 3

If the tens digit is t and ones digit is o then the number has to be 10*t + o.

Answer 4

Don't you have to get rid of the 3?

Answer 5

t + o = (10t+o)/3
=> 3t + 3o = 10t + o
=> 7t -2o = 0
=> 7t = 2o

But, since o = t+5, you can substitute.

=> 7t = 2(t+5)
=> 7t = 2t + 10
=> 5t = 10
=> t = 2

=> o = t +5
=> o = 7

Answer 6

So the answer is 27?

Answer 7

Yepsie doo!

Answer 8

THanks!