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Elizaveta1528
@Elizaveta1528
August 2021
2
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решите систему уравнений методом сложения
ПОМОГИТЕ ПОЖАЛУЙСТА
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diastry
9х - 6у = 24 (*(-1))
9х + 8у = 10
-9х + 6у = -24
9х + 8у = 10
6у = -24
9х + 8у = 10
у = -4
9х + 8*(-4) = 10
у = -4
9х = 10 + 32
у = 4
х =
1 votes
Thanks 2
Elizaveta1528
спасибо большое
diastry
бог мой я забыла сложить
diastry
всё не так, у Slavinaalena правильно
slavinaalena
9x - 6y = 24 | ×(-1)
9x + 8y = 10
-9x + 6y = -24
9x + 8y = 10
14x = -14
9x + 8y = 10
x = -1
-9 + 8y = 10
x = -1
8y = 19
x = -1
y = 19 / 8
Ответ : (-1 ; 19 / 8)
1 votes
Thanks 4
Elizaveta1528
спасибо большое
slavinaalena
рада помочь.
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Answers & Comments
9х + 8у = 10
-9х + 6у = -24
9х + 8у = 10
6у = -24
9х + 8у = 10
у = -4
9х + 8*(-4) = 10
у = -4
9х = 10 + 32
у = 4
х =
9x + 8y = 10
-9x + 6y = -24
9x + 8y = 10
14x = -14
9x + 8y = 10
x = -1
-9 + 8y = 10
x = -1
8y = 19
x = -1
y = 19 / 8
Ответ : (-1 ; 19 / 8)