A health food store sells a mixture of raisins and roasted nuts. Raisins sell for $4.00/kg and nuts sell for $6.00/kg. How many kilograms of each should be mixed to make 40 kg of this snack worth $4.75/kg?

Answer 1

the cost for the parts must add up to the cost for the mix, so

r+n = 40
4r+6n = 4.75*40

Answer 2

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