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Segundo número = y
x + y = 225
x - y = 135
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2x + 0y = 360
2x = 360
x = 360/2
x = 180
Reemplazo x en 1.
x + y = 225
180 + y = 225
y = 225 - 180
y = 45
Solución : Los números son : 45 y 180