78 trandafiri rosii,galbeni si albi
a = t albi = 18
b = t rosii = 2 x t galbeni
c = t galbeni
a+b+c=78
18 + 2 x c + c = 78
3 x c = 78 - 18
3 x c = 60
c = 60 : 3
c = 20
deci, trandafiri galbeni = 20 fire
rosii = 20 x 2 = 40 fire
albi = 18 fire
18 + 40 + 20 = 78 trandafiri
SAU
trandafiri albi ____
trandafiri rosii _____ _____
trandafiri galbeni _____
78 trandafiri - 18 trandafiri albi = 60 trandafiri
60 : 3 = 20
atunci trandafiri galbeni = 20 fire
rosii = 20 x 2 = 40 fire
