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Lenka1006
@Lenka1006
June 2022
1
8
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нужна помощь. срочно!!!!
система уравнений, надо решить методом подстановки.
4х+2у=-22
3х-1/7у=-5
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3x - 1/7 (- 11 - 2x) = - 5
3x + 11/7 + 2/7x = - 5
умножим все части уравнения на 7:
21x + 11 + 2x = - 35
23x = - 35 - 11
23x = - 46
x = - 2
Ответ: ( - 2; - 7).
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Answers & Comments
3x - 1/7 (- 11 - 2x) = - 5
3x + 11/7 + 2/7x = - 5
умножим все части уравнения на 7:
21x + 11 + 2x = - 35
23x = - 35 - 11
23x = - 46
x = - 2
Ответ: ( - 2; - 7).