Răspuns: 2,614 kg margarina 82%
Explicație:
in reteta respectiva se foloseste o cantitate de margarina pura x₁ :
100 kg ...............67 kg margarina
3,2 kg ................x = 67 x 3,2 : 100 = 2,144 kg margarina pura
aflata in alta concentratie = 82%, aceasta margarina se afla intr-o cantitate de x₂ :
82 kg margarina pura ..........100 kg
2,144 ................................... x = 2,144 x 100 : 82 = 2,614 kg
varianta scurta :
3,2 kg x 67 % : 82 % = 3,2 x 67 / 82 = 2,614 kg margarina 82%
