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Rister
@Rister
June 2022
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Решите уравнение:
4х+78,4/2,8 = 2х - 22,9/3,5
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prettypushkova
Verified answer
(4х + 78,4) : 2,8 = (2х - 22,9) : 3,5 - это пропорция
(4х + 78,4) * 3,5 = 2,8 * (2х - 22,9) - свойство пропорции
14х + 274,4 = 5,6х - 64,12
14х - 5,6х = - 64,12 - 274,4
8,4х = - 338,52
х = - 338,52 : 8,4
х = - 40,3
-----------------------------------
Проверка:
(4 * (-40,3) + 78,4) : 2,8 = (2 * (-40,3) - 22,9) : 3,5
- 82,8 : 2,8 = - 103,5 : 3,5
- 29,5714... = - 29,5714...
1 votes
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Answers & Comments
Verified answer
(4х + 78,4) : 2,8 = (2х - 22,9) : 3,5 - это пропорция(4х + 78,4) * 3,5 = 2,8 * (2х - 22,9) - свойство пропорции
14х + 274,4 = 5,6х - 64,12
14х - 5,6х = - 64,12 - 274,4
8,4х = - 338,52
х = - 338,52 : 8,4
х = - 40,3
-----------------------------------
Проверка:
(4 * (-40,3) + 78,4) : 2,8 = (2 * (-40,3) - 22,9) : 3,5
- 82,8 : 2,8 = - 103,5 : 3,5
- 29,5714... = - 29,5714...