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El numero = x
10% del 50% de x = 7
10% * 50% * x = 7
10/100 * 50100 * x = 7
(10 * 50x)/10000 = 7 Simplificamos ceros
(1 * 5x)/100 = 7
5x = 7 * 100
x = 700/5
x = 140
Respuesta.
7 es el 10% del 50% de 140