Respuesta :

Answer:

27

Step-by-step explanation:

let the number be 10x+y

so 10x+y=3(x+y)

7x=2,y=7

then 27=3(2+7)=27

Explaination:
Let the number be 10x+y (x is the first digit)
So 10x+y=3(x+y)
7x=2y
If x=2, y=7
Then 27=3(2+7) = 27

Solution:
The number is 27.
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