X=4
17=4k-3
4k=20
k=20/4
k=5
Проверяем:
17=4•5-3
17=20-3
17=17
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X=4
17=4k-3
4k=20
k=20/4
k=5
Проверяем:
17=4•5-3
17=20-3
17=17