Answer: FY measures 22 units.
Step-by-step explanation:
1. The triangle FYN and EYN are congruent.
2. Based on this, you can conclude the side FY and the side EY are equal, this means that both sides have the same length.
3. Therefore, you have:
[tex]FYN=EYN[/tex]
4. You must substitute values and solve for [tex]x[/tex], as following:
[tex]3x+7=5x-3\\2x=10\\x=5[/tex]
5. Now, you can calculate the length FY:
[tex]3(5)+7=22[/tex]
