Question

A glass of skim milk supplies 0.1 mg of iron and 8.2 g of protein. A quarter pound of lean red meat provides 3.75 mg of iron and 21 g of protein. If a person on a special diet is to have 7.36 mg of iron and 73 g of protein, how many glasses of skim milk and how many quarter-pound servings of meat would provide this?

Answer 1

If there are g glasses of skim and m servings of meat

.1g + 3.75m = 7.36
8.2g + 21m = 73

Now just solve and you get

g = 4.1
m = 1.8

So, 5 glasses of mile and 2 servings of meat will provide the desired amounts