Final answer:
To solve for x in a square where angle EAD is given as 15x, set it equal to its congruent angle ADC and solve for x.
Step-by-step explanation:
To solve for x, we can use the fact that the sum of the angles in a square is 360 degrees. In a square, opposite angles are congruent. Since angle EAD is given as 15x, we can set it equal to its congruent angle ADC:
15x = 180 - 15x
Simplifying the equation, we get:
30x = 180
Dividing both sides by 30, we find that x = 6.