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kvkv2259
@kvkv2259
July 2022
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2x+y = 11
3x+5y =20 спосіб перестановки
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Ответ :
2х + у = 11
3х + 5у = 20
у = 11 - 2х
3х + 5 (11 - 2х) = 20
3х + 55 - 10х = 20
3х - 10х = 20 - 55
- 7х = - 35
7х = 35
х = 5
у = 11 - 2 • 5
у = 1
Ответ : ( 5 ; 1 ).
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Ответ :
2х + у = 11
3х + 5у = 20
у = 11 - 2х
3х + 5 (11 - 2х) = 20
3х + 55 - 10х = 20
3х - 10х = 20 - 55
- 7х = - 35
7х = 35
х = 5
у = 11 - 2 • 5
у = 1
Ответ : ( 5 ; 1 ).