Help me, 2+4 3 ×4+(2×9)

Adaylily farm sells a portion of their daylilies and allows a portion to grow and divide. the recursive formula an=1.5(an-1)-100 represents the number of daylilies, a, after n years. after the fifth year, the farmers estimate they have 2225 daylilies. how many daylilies were on the farm after the first year?

The triangles are similar. what is the value of x? show your work.

Plz heeeeeeelp plz give me the answer