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Fernando = x
- Hace 10 años su edades sumaban 60:
3x/5 - 10 + x - 10 = 60
8x/5 = 80
x/5 = 10
x = 50
Pedro = 3(50)/5 = 30 (edad actual)
Dentro de 13 años: 30 + 13 = 43 años