Question

un fermier creste porumbei si purcei; in total sunt 51 de capete si 132 de picioare.Aflati citi porumbei si purcei are ferma? A)rezolvati broblema printro problema artimetica. B)Rezolvati problema prin ecuatie. VAROG AJUTATIMA!!!!

Answer 1

x- porumbei
y-purcei

x+y=51     > x=51-y                 >x=51-y         >x=51-y    >x=36 porumbei
2x+4y=132 >2(51-y)+4y=132 >102+2y=132>2y=30     >y=15 purcei

Answer 2

a=porumbei
b=purcei
a+b=51
a*2+b*4=132
2(a+2b)=132
a+3b=132-51
a+3b=81
51+2b=81
2b=81-51
b=30/2
b=15 porci
a=51-b
a=51-15
a=36 porumbei
Verificare: 2a+4b=132
                   2*36+4*15=132

*=ori
/=impartit

Succes!!!