Question

Помогите с заданием!!!

Answer 1

4. {3k+b=8
{-4k+b=1
7k=7
k=1
3•1+b=8
b=5
Ответ: у=х+5

5. {3–х+2у–4у=18
{2х–3у+3=6х–2у
{–х–2у=15
{–4х–у=–3 |•(-2)
{–х–2у=15
{8х+2у=6
7х=21
х=3
–3–2у=15
–2у=18
у=–9
Ответ: (3;–9)