Answer:
2x+7
Explanation:
the sum is addition so the answer needs a +
two times a number. let's call this number x. x multiplied by 2 is equal to 2x
seven is the number you want to add to the sum
therefore we can take each part and get the answer
2x(from two times a number)
+ (the sum)
and 7
this leads to the answer of 2x+7