Pat has $267.21. All you had to do was subtract the 2 numbers
You have to distribute it.
EXPLANATION:
13 pt 13-p
13-13
0 pt-p
-p-0
-p= 14
14 pt
= 14
Bearing in mind that an isosceles triangle has twin sides, and coming out of the vertex they make twin angles at the base, check the picture below.