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Niñas : 5k
Total : 160
5k + 3k = 160
8k = 160
K = 20
En la escuela hay 3k niños entonces : 3k = 3x20 = 60 niños
Suerte
8x= 160
x= 160/8
x= 20
Sustituímos y queda:
5 (20) + 3 (20)= 160
100 + 60 = 160
:v