Предмет: Алгебра, автор: totemchik2280

Розв'яжіть систему рівнянь

2x + 3y = 7
-5x+2y=11.

MizoriesKun: Любым способом?

Ответы

Автор ответа: MizoriesKun
2

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Приложения:
Автор ответа: 1Manka1
1
{2x + 3y = 7
{-5x+2y=11

{2х+3у=7
{х=-11/5+2/5у

2(-11/5+2/5у)+3у=7
-22/5+4/5у+3у=7
-22/5+19/5у=7
-22+19у=35
19у=35+22
19у=57
у=3
х=-11/5+2/5*3
х=-11/5+6/5
х=-1
(х;у)=(-1;3)
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