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Descuento = 10%
Precio del pantalon = p
Total a pagar = p - 10% de p = p - 10% * p = p - 10/100 * p
Total a pagar = p - 10p/100 = p - p/10 = 10p/p - p/10 =
Total a pagar = (10p - p)/10 = 9p/10
Respuesta.
9p/10