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Pavos = n
m + n = 35
2m + 4n = 116
Despejo m en 1
m + n = 35
m = 35 - n
Sustituyo m en 2
2m + 4n = 116
2 (35 - n) + 4n = 116
70 - 2n + 4n = 116
- 2n + 4n = 116 - 70
2n =46
n = 46/2
n = 23
Sustituyo el valor de n en el despeje de m
m = 35 - n
m = 35 - 23
m = 12
Solución : Hay 23 pavos y 12 cerdos