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2014-09-22T20:48:41+03:00
X-nr porumbei
y-nr purcei
  \left \{ {{x+y=51|*(-2)} \atop {2x+4y=132}} \right.
 \left \{ {{-2x-2y=-102} \atop {2x+4y=132}} \right.
2y=30  y=15( 15 purcei)
 [tex] \left \{ {{x+y=51|*(-4)} \atop {2x+4y=132}} \right. [/tex]
 \left \{ {{-4x-4y=-204} \atop {2x+4y=132}} \right.
-2x=-72
x=36 ( 36 porumbei)

verificare:
36+15=51
2*36+4*15=72+60=132

raspuns: 15 purcei si 36 porumbei


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