Предмет: Алгебра, автор: rabyh2014

Решение систему уравнений: фигурная скобка 5x-2y=11
                                                                         4x-y=4   

Ответы

Автор ответа: kate2495
0
{5x-2(4x-4)=11                  {5x-8x=11-8                     {x=-1
 y=4x-4                                  y=4x-4                              y=-8
Автор ответа: yshi84
0
из второго уравнения вы разим y=4x-4. под ставим в первое 5x-2*(4x-4)=11
у про ща ем 5x-8x+8=11
-3x=3 отсюда x=-1, тогда y=4*(-1)-4=-8.
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