Answer:
n is 24 degrees
EFG is 111 degrees
GFH is 69 degrees
Step-by-step explanation:
They are a linear pair so they are supplementary.
4n + 15 + 2n + 21 = 180
6n + 36 = 180
6n = 144
n = 24
4(24)+15 = 111
2(24)+21 = 69
