X would be 84 degrees, since its corresponding angle would be worth 84.
Hope this helped!
1/2 I guess I don't think you typed in the question correctly. Not trying to be mean.
Answer:
Each will receive
of the cake.
Step-by-step explanation:
Let the amount of cake = c
Lisa, Juan and Isaac are the persons who are sharing half of a cake equally.
Number of persons = 3
Part of the cake shared = 
Fraction of the cake shared by each = 
=
= 
Therefore, fraction of total cake shared by each member will be
of the total amount of cake.