Answer:
99
Step-by-step explanation:
102-3=99
1:2
3x-12y=216
-3x. -3x
-12y=216-3x
÷-12. ÷-12
Y= -18+1/4x
I think
The length of CD is 7-3=4.
Therefore, if we dilate by a scale factor of 3, the length is 4(3) = 12