Предмет: Алгебра, автор: dararuleva0

Решите систему уравнений
{2x-3y=4
{3x+2y=19

Ответы

Автор ответа: grefed

1

Ответ:

х=5; у=2

Объяснение:

домножаем

$\left \{ {{2x-3y=4|3} \atop {3x+2y=19|2}} \right.$

$\left \{ {{6x-9y=12} \atop {6x+4y=38}} \right.$

отнимаем второе уравнение от первого

-13у=-26

у=2

подставляем в первое уравнение

2х-6=4

2х=10

х=5

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