I think its the first one
Answer: X is 15. N is 100
Answer:

Step-by-step explanation:
The sum of 83 and a number would be
as an expression, where
is "said number".
3 multiplied by 4 is 12
<span>3 multiplied by 7 is 21 </span>
<span>that is how the photos are split 4:7</span>