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adelina121212
adelina121212
26.03.2022 23:22 •  Математика

Стрёх лугов собрали 19,7 т сена.с первого и второго лугов собрали сена поровну,а с трётьего собрали на 1,1 т больше,чем с каждого из первых двух.сколько сена собрали с каждого луга?

👇
Ответ:
ваня10001
ваня10001
26.03.2022

Пусть Х т собрали с 1 и со 2 лугов

Тогда Х+1,1 т - с 3 луга

 

Х+Х+Х+1,1=19,7

3Х+1,1=19,7

3Х=19,7-1,1

3Х=18,6

Х=6,2 т - собрали с 1 луга, со 2 луга

6,2+1,1= 7,3 т - собрали с 3 луга

4,8(61 оценок)
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Ответ:
astasevbogdanp08dn2
astasevbogdanp08dn2
26.03.2022

Пошаговое объяснение:

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4,7(20 оценок)
Ответ:
Howcould
Howcould
26.03.2022

Пошаговое объяснение:

9)

(30088-27028):30+29*31=1001

1)

_30088

27028

3060

2)

_3060 |__30

30 |102

_60

60

0

3)

29*31=20*31+9*31=620+279=899

4)

102+899=1001

10) магазины

1 магазин

1)4*190=760(руб) стоят 4 полотенца

2)760+950=1710 (руб) стоят полотенца и противень

3)5*90=450 (руб) стоят 5 стаканов

4)1710+450=2160 (руб) стоят 5 стаканов 4 полотенца и противень

5)2160+500=2660 (руб) вся покупка первого магазина

2магазин

1)220*4=880 (руб) стоят 4 полотенца

2)880+940=1820 (руб) стоят 4 полотенца и противень

3)5*80=400 (руб) стоят 5 стаканов

4)400+1820=2220(руб) стоят 4 полотенца, противень, 5 стаканов

5)2220+470=2690(руб) вся покупка второго магазина

ответ: 2660 рублей покупка первого магазина. Дешевле.

11) города

Согласно графику, город Пекин 4 по численности населения

4,4(8 оценок)
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