Предмет: Алгебра, автор: ildarrus96

принадлежит ли точка пересечения прямых -2x+y=11 и 3х+2y=1 прямой: а) 10х-3y=-45, б) -7x+9y=65

Ответы

Автор ответа: Матов

{-2x+y=11

{3x+2y=1

{y=11+2x

{3x+22+4x=1

{7x =-21

{x=-3

{ y=5

{10*-3-3*5=-30-15=-45

Ответ ДА! Второй

{-7*2+9*5=-14+45=31

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