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ed77714
@ed77714
August 2022
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Нужно решить систему уравнений.
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zhenyaM2002
Verified answer
{ 8x - 3y = 2
{-4x + 2y = 20 |*2
{ 8x - 3y = 2
{ - 8x + 4y = 40
Метод сложения:
8х - 3у + ( - 8х + 4у) = 2 + 40
8х - 3у - 8х + 4у = 42
(8х - 8х) + (4у - 3у) = 42
у = 42
8х - 3 * 42 = 2
8х - 126 = 2
8х = 2 + 126
8х = 128
х = 128:8
х = 16
Ответ: х = 16 ; у = 42 .
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ed77714
Спасибо, выручил!
zhenyaM2002
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Answers & Comments
Verified answer
{ 8x - 3y = 2{-4x + 2y = 20 |*2
{ 8x - 3y = 2
{ - 8x + 4y = 40
Метод сложения:
8х - 3у + ( - 8х + 4у) = 2 + 40
8х - 3у - 8х + 4у = 42
(8х - 8х) + (4у - 3у) = 42
у = 42
8х - 3 * 42 = 2
8х - 126 = 2
8х = 2 + 126
8х = 128
х = 128:8
х = 16
Ответ: х = 16 ; у = 42 .