Вопрос школьника по предмету Алгебра
Решите с помощью подстановки уравнение с-2р=5 2с-3р=9
Ответ учителя по предмету Алгебра
Ответ:
{2с — 3р = 9
{с — 2р = 5
с = 2p+5 из второго уравнения системы, подставляем в первое уравнение
2*(2p+5) — 3p = 9
4p +10 — 3p = 9
{p = -1
{c = 3
Объяснение:
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