Răspuns:
9 | 12ab0 ⇒ 9 | (1+2+a+b+0) ⇒ (1+2+a+b+0)∈M₉
1+2+a+b+0=9 ⇒ a+b=6 ⇒ (a; b)={(0; 6), (1; 5), (2; 4), (3; 3), (4; 2), (5; 1), (6; 0)}
1+2+a+b+0=18 ⇒ a+b=15 ⇒ (a; b)={(6; 9), (7; 8), (8; 7), (9; 6)}
1+2+a+b+0=27 ⇒ a+b=24 > 18 ⇒ a, b>9 nu convine
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Răspuns:
9 | 12ab0 ⇒ 9 | (1+2+a+b+0) ⇒ (1+2+a+b+0)∈M₉
1+2+a+b+0=9 ⇒ a+b=6 ⇒ (a; b)={(0; 6), (1; 5), (2; 4), (3; 3), (4; 2), (5; 1), (6; 0)}
1+2+a+b+0=18 ⇒ a+b=15 ⇒ (a; b)={(6; 9), (7; 8), (8; 7), (9; 6)}
1+2+a+b+0=27 ⇒ a+b=24 > 18 ⇒ a, b>9 nu convine