Arabica coffee costs 28$ per pound and robusta coffee costs8.75 per pound how many pounds of arabica coffee should you mix with 5 pounds of robusta coffee to make a coffee blen that costs 12$ per pound?

Amount of Arabica coffee mixing =   1.016 pounds

Step-by-step explanation:

Cost of Arabica coffee = 28$ per pound

Cost of Robusta coffee = 8.75$ per pound

Amount of Robusta coffee mixing = 5 pounds

Cost for 5 pounds of Robusta coffee = 5 x 8.75 = 43.75 $

Let m be the Amount of Arabica coffee mixing, we have price of mix = 12$ per pound

That is

               43.75 + m x 28 = ( m + 5 ) x 12

               43.75 + 16 m = 60  

                           16 m = 16.25

                               m = 1.016 pounds

    Amount of Arabica coffee mixing =   1.016 pounds