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Julio → x
Hace 20 años -- -20
x - 10 - 20 + (x - 20) = 60
x - 30 + x - 20 = 60
2x - 50 = 60
2x = 110
x = 55
Emilia → x - 10 = 55 - 10 = 45
Julio → x = 55