Предмет: Алгебра, автор: MaximDomrachev

Решите систему уравнений 1 ) {3x+y=7
{9x-4y=-7
2){7y-x=5
{4x+5y=2
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Ответы

Автор ответа: medet48
0

{у=7-3х

{9х-4(7-3х)=-7

х=1

у=7-3*1

у=4

(х,у)=(1,4)

{3*1+4=7

{9*1-4*4=-7

{7=7

{-7=-7

(х,у)=(1,4)

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