Question

Найти x {3x-2y=0
{x+y=5

Answer 1

Ответ:

$3x - 2y = 0 \\ x + y = 5 \\ \\ 3x - 2y = 0 \\ y = 5 - x \\ \\ 3x - 2(5 - x) = 0 \\ 3x - 10 + 2x = 0 \\ 5x = 10 \\ x = 2$