El numero de 3 cifras que restado de su complemento aritmetico da 146:
1000-x=y
y+x=1000
y-x=146
1000+146-y=y
1146=2y
y=573
x=427
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1000-x=y
y+x=1000
y-x=146
1000+146-y=y
1146=2y
y=573
x=427