Предмет: Математика, автор: nkanat865

2) решаем линейные тендеры с двумя вращающимися
{5x +y =15
{3 x + 4 y = 26
как решить

Ответы

Автор ответа: dobra888
1

Ответ:      ( 2 ; 5 ) .

Пошаговое объяснение:

{ 5x +y = 15 ,         | X ( - 4)

{ 3 x + 4 y = 26 ;

{ - 20x - 4y = - 60 ,

{ 3 x + 4 y = 26 ;

--------------------------------

- 17x   = - 34 ;

     x = 2 ,  тоді із І - го рівняння даної системи

у = 15 - 5х = 15 - 5 * 2 = 5 .      

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