Question

СРОЧНО ПОМОГИ-ТЕ
{x+y=3;
{-3x+4y=26.

Answer 1

{x+y=3

{-3x+4y=26

{x=3-y

{-3x+4y=26

-3(3-y)+4y=26

y=5

x=3-y

x=3-5

x=-2

(x;y)=(-2;5)