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banana7771
@banana7771
July 2022
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решите уравнение 3 (x+4)+2×(7-x)=24 дам 15балов
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ampilosha
3х+12+14-2х=24
х=-2
Ответ : -2
1 votes
Thanks 1
banana7771
у тебя правильно все и твой ответ лучши
DashaLutova
(x+4)+2× (7-x)=25
(x+6)(7-x)=25
7x+- x²+42-6x= 25
7x-x²-6x=25-42
x-x²=23
0 votes
Thanks 1
DashaLutova
Простите, не заметила 3
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Answers & Comments
х=-2
Ответ : -2
(x+6)(7-x)=25
7x+- x²+42-6x= 25
7x-x²-6x=25-42
x-x²=23