Question 86261

Let x pounds of coffee beans that cost $2.60 per pound be mixed with 4 pounds of coffee beans that cost $1.80 per pound.

Then we get (4+x) pounds of coffee that cost $2.28 per pound.

The equation is:

2.60x + 4*1.80 = (4+x)*2.28

==> 2.6x + 7.2 = 9.12 + 2.28x

==> 2.6x - 2.28x = 9.12 - 7.2

==> 0.32x = 1.92

==> x = 1.92/0.32

==> x = 6

So 6 pound of coffee beans that cost $2.60 per pound should be mixed with 4 pounds of coffee beans to get the desired mixture.


Good Luck!!!