VA ROG!!!DAU COROANA!!!URGENT!!!
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Notam ca a nr. de bile rosii ; si cu b nr. de bile verzi.
a+b = 24
b = a:3 => a = 3 x b
3 x b + b = 24
4 x b = 24
b = 24: 4 = 6
a = 3 x 6 = 18
a+b = 18+6 = 24 = corect
Bile rosii = 18
Bile verzi = 6