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DANILA34rus
@DANILA34rus
March 2022
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Решите пример под буквой Б в номере 293
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artkolp
Verified answer
1. 43,2*(11х/18-7/8) = 216/5 * 11х/18 - 216/5 * 7/8 = 2376х/90 - 1512/40.
2. 25,5*(9х/17-2/3) = 51/2 * 9х/17 - 51/2 * 2/3 = 27х/2 - 17.
3. 2376х/90 - 1512/40 - (27х/2 - 17) = -59,5
4. 2376х/90 - 1215х/90 = 1512/40 - 680/40 - 2380/40
5. 1161х/90 = -1548/40
6. 4644х = -13932
х = -3
0 votes
Thanks 0
Удачник66
Я проверил свой ответ -3, все сошлось. У вас ошибка.
artkolp
Да, спасибо, в конце при выделении общего знаменателя умножил не на 9, а на 6. Всё подправил, теперь всё верно.
Удачник66
Verified answer
Умножаем все на 10
132x*2- 27x*5- 378+ 170=-595
264x - 135x = 208 - 595 = -387
129x = -387
x = -387/129 = -3
2 votes
Thanks 1
artkolp
Спасибо.
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Answers & Comments
Verified answer
1. 43,2*(11х/18-7/8) = 216/5 * 11х/18 - 216/5 * 7/8 = 2376х/90 - 1512/40.2. 25,5*(9х/17-2/3) = 51/2 * 9х/17 - 51/2 * 2/3 = 27х/2 - 17.
3. 2376х/90 - 1512/40 - (27х/2 - 17) = -59,5
4. 2376х/90 - 1215х/90 = 1512/40 - 680/40 - 2380/40
5. 1161х/90 = -1548/40
6. 4644х = -13932
х = -3
Verified answer
Умножаем все на 10
132x*2- 27x*5- 378+ 170=-595
264x - 135x = 208 - 595 = -387
129x = -387
x = -387/129 = -3