You can't add the same number to 2 different numbers and get the same answer, so no.
Answer:
x=30° y=4
Step-by-step explanation:

cross multiple
5y=8(2.5)
5y=20
divide 5 by 20
and you should y=4
since the polygons are similar x should have the same degrees as the bigger polygon
The answer is x=3; i did the work below