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Segundo número = y
x + y = 76
y = x/2 = 10
2y = x + 20
x + y = 76
-x + 2y = 20
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3y = 96
3y = 96
y = 96/3
y = 32
Reemplazo en 1.
x + y = 76
x + 32 = 76
x = 76 - 32
y =44
Solución : Los números son : 32 y 44