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x-y=8..............x=8+y
x+2=3y..........x=3y-2
hacemos igualacion.
3y-2=8+y
3y-y=8+2
2y=10
y=10/2
y=5
si y=5
x=8+y
x=8+5
x=13
los numeros son 13 y 5