A number is three times the sum of its digits. What is the number?
Answers
Answered by
1
Answer:
Since x must be an integer, the only value of y that work is 7. So y =7 and x =2.
In other words the number is 27
Answered by
2
Answer:
27
Step-by-step explanation:
Let the digit at tens be t and the digit at units be y
10 t + y = 3 ( t + y )
10 t + y = 3 t + 3 y
10 t - 3 t + y = 3 y
7 t + y = 3 y
7 t = 3 y - y
7 t = 2 y
t / y = 2 / 7
digit at tens = 2 = 2 x 10 = 20
digit at units = 7 = 7 x 1 = 7
So, the required answer = 20 + 7 = 27
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