Solve for x. show the equation you used and your work.

Since the triangles in the figure are similar, then we have to
 ((14 + 6) / (14)) = ((21+ (x + 4)) / (21))
 Clearing for x
 ((20) / (14)) = ((25 + x) / (21))
 ((20) / (14)) * 21 = 25 + x
 x = ((20) / (14)) * 21-25
 x = 5
 answer
 x = 5

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

Thats where they was ported and the fields that noone really knew much about needed tended, so they put slaves out there do free work and huge profits and so on the north decided to hold its own and was more different way of survival did not have same climate conditions to afford protecting slaves from winter so expenses be diff from south