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Cerdos hay = s
Pavos hay = t
s + t = 35
4s + 2t = 116
Despejo s en ecuación 1
s + t = 35
s = 35 - t
Sustituyo s en ecuación 2
4s + 2t = 116
4 (35 - t) + 2t = 116
140 - 4t + 2t = 116
- 4t + 2t = 116 - 140
- 2t = - 24
t = - 24/-2
t = 12
Sustituyo el valor de t en el despeje de s
s = 35 - t
s = 35 - 12
s = 23
Respuesta.
Hay 23 cerdos y 12 pavos