Question

a nut mixture is made from two types of nuts: one type selling for 7.50/kg the other selling for 9.50/kg what mass of each type of nut should ne included in a 3 kg mixture that sells for 25

Answer 1

If there are x kg of the 7.50 nuts, the rest (3-x) are 9.50

So, add up the cost of the amounts used. It must equal the final cost.

7.50x + 9.50(3-x) = 25.00