Question

А) х+2у-3, х+у+1=0; В) 4х+у-2=0, 3х+у+3=0 Подробно Решите)

Answer 1

A) {x+2y–3=0
{x+y+1=0
{x=3–2y
{3–2y+y+1=0
–y=–4
y=4
x=3–2•4=–5
Ответ: (–5;4)

В) {4х+у–2=0
{3х+у+3=0
{у=2–4х
{3х+2–4х+3=0
–х=–5
х=5
у=2–4•5=–18
Ответ: (5;–18)