raisings sell for $4.50/lb. and bran flakes sell for $2.80/lb. how many pounds of raisins should be mixed with 12 lb. of bran flakes to get a mixture that sells for $3.14/lb.?

Answer 1

4.50X + 12*2.80 = (x+12)*3.14

4.5x + 33.6 = (3.14)x + 37.68

4.5x - 3.14x = 37.68 - 33.6

1.36x = 4.08

x = 3