Respuesta :

one half = 1/2

sum of 15 and a number = 15 + x

Note that it is one half of, and so 15 + x is first

1/2(15 + x), or 3), is your answer

hope this helps

Because it is the sum it will be 15+x
And 1/2 as given in the question
=> answer is option 3
1/2(15+x)