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errreir
errreir
08.06.2021 20:31 •  Математика

Решите буду х*5-2,7=22,7 3х+5=8х-15

👇
Ответ:
uma12
uma12
08.06.2021
3x-8x=-15-5 -5x=-20 x=-20:(-5) x=4 5x-2,7=22,7 5x=22,7+2,7 5x=25,4 x=25,4:5 x=5,08
4,5(43 оценок)
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Ответ:
astasevbogdanp08dn2
astasevbogdanp08dn2
08.06.2021

Пошаговое объяснение:

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4,7(20 оценок)
Ответ:
Howcould
Howcould
08.06.2021

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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