The area of a certain desert​ (Desert 1) is nine times the area of another desert​ (Desert 2). If the sum 40,000,000 of their areas is square​ miles, find the area of each desert

Answer 1

D1 = 9D2

D1 + D2 = 40K^2 (K=1000)

9D2 +D2 = 40K^2

10D2 = 40K^2

D2 = 4K^2 = 4,000,000 mi^2

D1 = 9D2 = 36,000,000 mi^2