A store is having a sale on walnuts and chocolate chips.

Question

A store is having a sale on walnuts and chocolate chips. For 4 pounds of walnuts and 8 pounds of walnuts and $21. For 2 pounds of walnuts and 3 pounds of chocolate chips, the total cost is $9. . Find the cost for each pound of walnuts and each pound of chocolate chips.

Answer 1

4 pounds of walnuts and 8 pounds of chocolate chips cost $21

4W + 8C = 21

2 pounds of walnuts and 3 pounds of chocolate chips cost $9

2W +3C = 9

multiply by 2

4W +6C = 18

subtract the last equation from the 1st

8C -6C = 21-18

2C = 3

C = 3/2 = $1.50 for one pound of chocolate chips

2W = 9-3C = 9-3(1.5) = 9-4.5 = 4.5

W = 4.5/2 = $2.25 for one pound of walnuts

chec the answers

4(2.25) + 8(1.5) = 9+12 = 21

2(2.25) + 3(1.5) = 4.5+4.5 = 9