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Segundo número = y
x + y = 48
x - y = 8
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2x + 0y = 56
2x = 56
x = 56/2
x = 28
Reemplazo en 1.
x + y = 48
28 + y = 48
y = 48 - 28
y = 20
Solución : Los números son : 20 y 28