Answer:
Amount of Grey tea = 100 pounds
Amount of Orange Pekoe tea = 300 pounds
Explanation:
let G = amount of Grey tea
let 400 - G = amount of Orange Pekoe tea
6G + 4 (400 - G) = 4.5 x 400
6G + 1,600 - 4G = 1,800
2G = 1,800 - 1,600 = 200
G = 200 / 2 = 100
400 - G = 400 - 100 = 300