Explanation:
hindi ko alam kung ano ang ibig mong sabihin
Answer:
EF = 63
DE + EF = DF
7x + 9 + 9x + 9 = 114
16x + 18 = 114
16x = 96
x = 6
EF = 9(6) + 9
EF = 54 + 9
The Air Pollution Control Act of 1955 was the first federal legislation involving air pollution