Answer:
Distributive property says that:

Addition property of equality:
if x = y then x+z = y+z
Division property of equality:
if x = y then 
As per the statement:
Given the equation: 
Tyra solve this equation as shown below:
1.
[Distributive property]
2.
[Addition property of equality]
3.
{Division property of equality]
Therefore, the property Tyra used in line 1 was : Distributive Property.
We know that
<span>Since a circle is 360 degrees,
then
360</span>°-----------> 100%
<span>x </span>°----------> <span>15%
</span>x=15*360/100-----> x=54°
the answer is
54 degrees