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Hohlatska
@Hohlatska
April 2022
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Упражнение 71 номер2 пожалуйста!
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fanta2310
Verified answer
х - 5 6
--------- = ------
20 7
х - 5 = 6/7 * 20
х -5 = 120/7
х = 120/7 + 5
х = 120/7 + 35/7
х = 155/7 = 22 1/7
или пропорция
7 * (х - 5) = 20 * 6
7х - 35 = 120
7х = 120 + 35
7х = 155
х = 155 : 7
х = 22 1/7
1 votes
Thanks 1
Hohlatska
спасибо.
Hohlatska
благодорю.
Hohlatska
)))))
lenapanova
Ответ неверный, подставьте значение х и равенство не получится.
lenapanova
120 + 35 = 155, а не 185
lenapanova
Verified answer
(х - 5) * 7 = 20 * 6
7х - 35 = 120
7х = 120 + 35
7х = 155
х = 22 1/7
0 votes
Thanks 1
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Answers & Comments
Verified answer
х - 5 6--------- = ------
20 7
х - 5 = 6/7 * 20
х -5 = 120/7
х = 120/7 + 5
х = 120/7 + 35/7
х = 155/7 = 22 1/7
или пропорция
7 * (х - 5) = 20 * 6
7х - 35 = 120
7х = 120 + 35
7х = 155
х = 155 : 7
х = 22 1/7
Verified answer
(х - 5) * 7 = 20 * 67х - 35 = 120
7х = 120 + 35
7х = 155
х = 22 1/7