2(3) - (-2) = 8 … r u missing part of the question?
You need to bring them to a common denominator by multiplying the numbers below and above the line by the denominator of the other:
![4*15/(7*15)](https://tex.z-dn.net/?f=4%2A15%2F%287%2A15%29%20)
and the other one will be
![8*7/(15*7)](https://tex.z-dn.net/?f=8%2A7%2F%2815%2A7%29)
when we calculate we have
60/105 and the other number is 56/106.
now we can add them:
(60+56)/105=116/105= 1 and 11/105 or 1.104....
The measure of an interior angle of a regular pentagon is 108 degrees.