Предмет: Математика, автор: kopyrkina

Помогите пожалуйста с 1242 б .

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Ответы

Автор ответа: regina12022

1) 125-42=83 ученика во 2 и третьем классе
2) х+х+3=83
2х=83-3
2х=80
х=80:2
х=40 учеников во втором классе
3) 40+3=43 ученика в третьем классе

Автор ответа: rus030801

Решить систему уравнений

{ 7*(2x+y)-5*(3x+y)=6
{ 3*(x+2y)-2*(x+3y)=-6

Автор ответа: rus030801

помогите

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