I wasn’t here for this lesson and im lost

Ascatterplot is produced to compare the size of a school building to the number of students at that school who play an instrument. there are 12 data points, each representing a different school. the points are widely dispersed on the scatterplot without a pattern of grouping. which statement could be true

Don't know how to find x given these segment lengths

What is the value of x when x + 7 = 21?