Diego bought some raisins and walnuts to make trail mix. trail mix . Raisins cost $4 a pound and walnuts cost $8 a pound. Diego spent $15 on both ingredients.

Question

Diego spent $15 and bought exactly 2 pounds of raisins and walnuts . How many pounds of each did he buy ?

Answer 1

r represents the amount of raisins

2 - r represents the amount of walnuts

4r + 8(2 - r) = 15

Can you solve for r and answer?