Answer:
x=-1
Step-by-step explanation:
NO IM LATE IM SO SORRY IT B
The complete question in the attached figure
we know that
length side AB=8 units
length side DE=4 units
[ABC]=[DEF]*[scale factor]
then
[scale factor ]=[ABC]/[DEF]---------> 8/4--------> 2
the answer is
the scale factor for a dilation image of DEF to obtain ABC is 2
2/20 aka 1/10- hope this helped!