45 баллов РЕШИТЕ УРОВНЕНИЕ а)(62+х)*9=1392-672 б)9*у+180=99*17 в)720:(5*х-12)=34. Created by Sashaposk. matematika-ru

45 баллов РЕШИТЕ УРОВНЕНИЕ а)(62+х)*9=1392-672 б)9*у+180=99*17 в)720:(5*х-12)=34...

July 2022 2 3 Report

45 баллов РЕШИТЕ УРОВНЕНИЕ
а)(62+х)*9=1392-672
б)9*у+180=99*17
в)720:(5*х-12)=34

Verified answer

А) (62 + x)*9 = 720
62 + x = 720:9
62 + x = 80
x = 80 - 62
x = 18

б) 9*y + 180 = 1683
9*y = 1683 - 180
9*y = 1503
y = 1503 : 9
y = 167

в) 5*x - 12 = 720 : 34
5*x - 12 = 21 3/17
5*x = 21 3/17 + 12
5*x = 33 3/17
x = 564/17 : 5
x = 564/85 = 6 54/85

3 votes Thanks 5

Stuffine А)(62 + x) · 9 = 1392 - 672
558 + 9x = 720
9x = 720 - 558
9x = 162
x = 18.
Ответ: 18
б)9 · y + 180 = 99 · 17
9y + 180 = 1683
9y = 1683 - 180
9y = 1503
y = 167.
Ответ: 167
в)720 : (5 · x - 12) = 34
720 : (5x - 60) = 34
720 : 5x - 60 = 34
5x - 60 = 720 : 34
5x = 21,1 + 60
5x = 81,1
x = 16,2.
Ответ: 16,2

0 votes Thanks 1

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