Sam is 3 years younger than marco. marco is 15 years old. how old is sam?
let x represent sam's age
(there are 2 correct answers)

x + 15 = 3

x + 3 = 15

15 / x = 3 < < the slash is divided

3 x = 15

15 - x = 3

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.

here is a big fat