Respuesta :

Answer:

51 billetes de 100

Step-by-step explanation:

x + y = 68

100x + 200y = 8500

x = 68-y

Substitution:

100(68-y) + 200y = 8500

6800 - 100y + 200y = 8500

100y = 8500 - 6800

y = 1700/100

y = 17

x + y = 68

x + 17 = 68

x = 68 - 17

x = 51

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