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Автор - batryhanmadiar391

Решить задачу в 284. А в номере 285, найти неизвестный член пропорций.​

Ответ

Автор - jekadva

Ответ:

Пошаговое объяснение:

284)

1) 18 7/13 : 10 1 /24 =  241/13 * 24/241 = 24/13 = 1 11/13

2) 2 11/13 - 1 11/13 = 1

3) 1 : 15/62 = 62/15 = 4 2/15

4) 4 2/15 - 2,4 = 4 2/15 - 2 2/5 = 4 2/15 - 2 6/15 = 1 11/15

ответ: 1ц. 11/15

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285)

(10 - 7,7)*x = (2,8+8,7)* 2 3/5

2,3x = 11,5 * 2,6

2,3x = 29,9

x = 29,9 : 2,3

x = 13

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