MATH (Algebra)
posted by Shakeena Benton .
Allmixedup nut shop sells mix consisting of cashews and pistachios. how many pounds of cashews, which sell for $7 per pound , should be mixed with 4 pounds of pistachios which sell for $4 per pound to get a mix of $5 per pound?

7c + 4(4) = 5(c+4)
c = 2