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ex 4 vrg !!coronita.......

Ex 4 Vrg Coronita class=

Răspuns :

10 dictionare...............2 truse.................550 lei
10 dictionare...............5 truse................1150 lei
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//                                   3 truse=600 lei
1 trusa=600:3
1 trusa=200 lei

10 dictionare+2x200=550
10dictionare+400=550
10 dictionare=150 
1 dictionar=150:10
1 dictionar=15 lei

10x15+2x200=150+400=550