Answer:
x = 30
Step-by-step explanation:
this is an isosceles triangle, which mean that PRQ and PQR are equal.
all sides of a triangle equal 180.
using this, you can make the following equation:
x + (2x + 15) + (2x + 15) = 180
<em>combine like terms</em>
5x + 30 = 180
<em>subtract 30 from both sides</em>
5x = 150
<em>divide both sides by 5</em>
x = 30