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kevin17
@kevin17
July 2022
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решить уравнение 4(3 - 2 х) - 11= 7
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AlienQueen
Verified answer
4*3 - 4*2х - 11 - 7 = 0
12 - 8х -18 = 0
12 - 18 = 8х
- 6 = 8х
х = - 6/8
х = - 3/4
3 votes
Thanks 2
Яна38516
Verified answer
4(3-2х)-11=7
12-8х-11=7
-8х=7+11-12
-8х=6
х=-6/8=-3/4
Проверка:
4(3-2*(-3/4))-11=7
4(3+3/2)-11=7
4*3 3/2-11=7
4*9/2-11=7
18-11=7
7=7
Ответ: х=-3/4
0 votes
Thanks 1
kevin17
Вот 4(3 - 2 х) - 11= 7 а не 4(3 - 3 х) - 11= 7
Яна38516
ок, сейчас перерешаю
AlienQueen
что тут происходит?
Яна38516
я ошиблась , когда переписывала уравнение с задания, и пришлось перерешать
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Answers & Comments
Verified answer
4*3 - 4*2х - 11 - 7 = 012 - 8х -18 = 0
12 - 18 = 8х
- 6 = 8х
х = - 6/8
х = - 3/4
Verified answer
4(3-2х)-11=712-8х-11=7
-8х=7+11-12
-8х=6
х=-6/8=-3/4
Проверка:
4(3-2*(-3/4))-11=7
4(3+3/2)-11=7
4*3 3/2-11=7
4*9/2-11=7
18-11=7
7=7
Ответ: х=-3/4