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Total animales = 40
Total conejos = x
Total gallinas = 40 - x
Total patas = 106
Total patas de conejo = 4x
Total patas de gallinas = 2( 40 - x)
4x + 2( 40 - x) = 106
4x + 80 - 2x = 106
2x + 80 = 106
2x = 106 - 80
2x = 26
x = 26/2
x = 13
Total conejos = 13
Total gallinas = 40 - 13 = 27
Respuesta.
Hay 13 conejos y 27 gallinas