X=8
since DE is the mid segment, it connects the midpoints of the two sides. meaning that the length would be equal on both sides.
Ok . since they are similar you can use similarity factor
If you mean x^2 then there would be no answer after all, 3^2= 9 and 4^2= 16 so
If you mean 2x then the answer would be 5
Hope I helped?
Answer:
Yellow = 18 spools of ribbon
Blue = 15 spools of ribbon
Bobby will have 3 more spools of yellow ribbon.