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teachhuu
@teachhuu
June 2022
2
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помогите решить ТЕСТ
Реши систему уравнений методом подстановки:
{x−2y=−67x−12y=7
(В ответе запиши только числа.)
Ответ: (___ ; ___).
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iramazurk
Ответ:Объяснение:х - 2у = -67х - 12у = 7х = -6 + 2у7х - 12у = 71) 7х - 12у = 77(-6 + 2у) - 12у = 7-42 + 14у - 12у = 714у - 12у = 7 + 422у = 49у = 49 : 2у = 24,52)x = -6 + 2yх = -6 + 2*24,5х = -6 + 49х = 43Ответ: (43; 24,5)
2 votes
Thanks 2
teachhuu
спасибо большоее <3
kamilmatematik100504
Объяснение: [tex]\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\la\la\la\la\ddddddddddddddddddddddddddddddddcleverdddddd\ffffffffffffffffffffffffffffffffffffffff\pppppppppppppppppppppppppppppppppppp\ddddddddddddddddddd\displaystyle\ \Large \boldsymbol{} 1) -\left \{ {{x-2y=-6} \ \ |\times6 \atop {\!\!\!\!\!\!\!\!\!\!\!\!7x-12y=7}} \right. => \\\\\\\\ 6x-7x-12y\!\!\!\!\!\!\diagup + 12y\!\!\!\!\!\!\diagup=- 36-7 \\\\\\\displaystyle\ \Large \boldsymbol{} \!\!\!\!-x=-43 \\\\\\ x=43 \ ; \ y=(-6-43):(-2)=24,5[/tex] [tex]\displaystyle\ \Large \boldsymbol{}Otvet: (43 \ ; \ \ 24,5)[/tex]
3 votes
Thanks 1
teachhuu
спасибо !!
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