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# niñas = x+1
PLANTEO DE LA ECUACION
Si se va un niño, el nuero de niños será x-1
x+1 = 2(x-1)
x+1 = 2x-2
x-2x = -2-1
-x = -3
x = 3
# niños = x = 3
# niñas = x+1 = 3+1 = 4
Hay 3 niños y 4 niñas