Question

Impreuna, 3 scanduri uscate de brad si 5 scanduri verzi cantaresc 76 kg. Doua scanduri uscate si 6 scanduri verzi cantaresc 80 kg. calculeaza masa fiecarui fel de scandura

Answer 1

3 s uscate....5 s verzi.....76 kg/×2
2 s uscate....6 s verzi.....80 kg/×3

6 s uscate....10 s verzi....152kg
6 s uscate....18 s verzi....240 kg
18-10=8
240-152=88 kg
88:8=11kg o scandura verde
11×5=55kg
76-55=21 kg
21:3=7 kg o scandura uscata
V 7×3+11×5=21+55=76 kg