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2018-{2017-[2017-2×(63×a+1)+2017]}=1

Răspuns :

Valimimicata
2017-[2017-2×(63×a+1)+2017=2019
2017-2 (63a+1)+2017=4036
2 (63a+1)+2017=5053
2 (63a+1)= 2936
63a+1=1468
63a=1467
a=23,(285714)

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