Answer:
First number = 13
second number = 26
Explanation:
Their total number is = 36
Let the first number be = n
the second number be = 2n as you said in the question.
the value of n
=n + 2n = 39
=3n = 39
Note// divide both side by 3
=3n/3 = 39/3
n = 13.
therefore:
the first number = n = 13
the second number = 2n = 2( 13 ) = 26.