Răspuns :
notam nr de flori cu X si nr de vaze cu Y
X=5Y+6
X=7(Y-1)+3 => X=7Y-4
5Y+6=7Y-4 => 2Y=10 => Y=5
X=5Y+6 => X =5*5+6 => X=31
Mama are 31 de ani, a primit 31 de trandafiri si are 5 vaze
X=5Y+6
X=7(Y-1)+3 => X=7Y-4
5Y+6=7Y-4 => 2Y=10 => Y=5
X=5Y+6 => X =5*5+6 => X=31
Mama are 31 de ani, a primit 31 de trandafiri si are 5 vaze
mama are 31 de ani, are 5 vaze si 31 de trandafiri
deoarece:
a=nr. flori b=nr. vaze
a=5b+6
a=7(b-1)+3 => a=7b-4
5b+6=7b-4 => 2b=10 => b=5
a=5b+6 => a =25+6 => a=31
deoarece:
a=nr. flori b=nr. vaze
a=5b+6
a=7(b-1)+3 => a=7b-4
5b+6=7b-4 => 2b=10 => b=5
a=5b+6 => a =25+6 => a=31