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Padre: 6x 10y
Hijo : x 5y
6x+2 = 10y-18
20 = 10 - 6x... (I)
x+2 = 5y- 18
20 = 5y-x
40 = 10y- 2x
40+2x = 10y ....(II)
II en I
20 = 40 + 2x - 6x
x=5
entonces tienen 32 y 7 actualmente