Lauren H. answered 09/13/18
Tutor
4.8
(24)
Experienced High School Chemistry Teacher
Roger bought two plots of land for a total of 120,000
x + y = 120,000, y = 120,000 - x
When he sold the first plot, he made a profit of 15%.
(x)1.15
When he sold the second, he lost 10%
(y).90
his total profit was $5500
120,000 + 5500 = 125,500
125,500 = (x)1.15 + (y).90
125,500 = (x)1.15 + (120,000 - x)(.90)
125,500 = 1.15x + 108,000 - .90x
17500 = .25x
x = 70,000
y = 50,000