решите графически систему линейных уравнений { х + 2y = 4 - 2х + 5 y = 10

Ответ:

х+2у=4 -2х+5у=10 выражаем хчерезу х=4-2у  -2х+5у=10  -2*4-2у=10  х=4-2у  -8+4у+5у=10  9у=18 у=2 находим х   х+2*2=4 х=0                                                                                                                                                                                                                                                                                              

Источник: https://znanija.com/task/213565