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uliananalyvaiko
@uliananalyvaiko
June 2023
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Помогите решить 2 и 7 даю 35 балов !!!
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vitusgolovataya
°2.
7a + 7b + 21 = 7(a + b + 3).
°7.
а, а+1, а+2, а+3;
(а+2)(а+3)-а(а-1)=66;
а²+3а+2а+6-а²-а=66;
4а=60;
а=15;
Ответ:15, 16, 17, 18.
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Answers & Comments
7a + 7b + 21 = 7(a + b + 3).
°7.
а, а+1, а+2, а+3;
(а+2)(а+3)-а(а-1)=66;
а²+3а+2а+6-а²-а=66;
4а=60;
а=15;
Ответ:15, 16, 17, 18.