The owner of Nuts2U Snack Shack mixes cashews worth 625 a po

The owner of Nuts2U Snack Shack mixes cashews worth $6.25 a pound with peanuts worth $2.00 a pound to get a half-pound mixed nut bag worth $1.80. How much of each kind of nut is included in the mixed bag?

Solution

full pound nut bag worth will be = 1.8*2 = 3.6

6.25x +2y = 3.6

cashew added = 0.42 pound
and peanut = 1/2 pound