Question

Apple + Orange = $20

Apple is twice the price of the orange
How much does the apple cost?

Answer 1

Let Apple be 2x and y
According to question,
x + 2x = 20
3x = 20
x = 20/3
x = 6.6667
2x = 2 x 6.667 = 13.33

Answer 2

Explanation:

let price of Orange=x

price of Apple=2x

x+2x=20

3x=20

x=20/3

cost of Apple=2x=2×20/3=40/3=$13 1/3