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2p+4c = 168
p = 58-c
2(58-c) + 4c = 168
116 - 2c +4c = 168
2c = 168-116
2c = 52
c = 52/2
c = 26
p = 58-c
p = 58-26
p = 32
comprobación:
2p + 4c = 168
(2*32) + (4*26) = 168
64 + 104 = 168
Respuesta:
La cantidad que hay en la granja es:
Pavos: 32
Cerdos: 26