Предмет: Алгебра, автор: Аноним

не выполняя построения, найдите координаты точки пересечения графика линейной функции: у=7х-1 и у=2х

Ответы

Автор ответа: necessary1
0

Составим систему уравнений:

у=7х-1

у=2х

Подставляем 2х в первое уравнение. Получается следующее: 

2х=7х-1

у=2х

Решаем первое уравнение

2х=7х-1

2х-7х=-1

-5х=-1

х=1/5

Подставляем получившуюся координату во второе уравнение

у=2х

у=2*1/5=2/5

 

Ответ: (1/5; 2/5)

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