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"Ion are porumbei si iepuri .Cati porumbei si cati iepuri are Ion, daca in total sunt 51 de capete si 132 de picioare?"

Răspuns :

a-porumbei,b-iepuri
a+b=51
2a+4b=132
a=51-b
2(51-b)+4b=132
102-2b+4b=132
2b=30
b=15
a=51-15=36