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GALLINAS "G"
POR LOS DATOS:
O + G = 8 (CABEZAS) ....................... (I)
4O + 2G = 26 (PATAS) ........................(II)
LA ECUACIÓN (I) MULTIPLICO POR 2:
2O + 2G = 16 ........................(III)
RESTANDO (II) - (III)
2O = 10
O = 5 (SON 5 LAS OVEJAS)