Question

Решите систему уравнения
{3х-2у=4
{Х+2у=5

Answer 1

{3x-2y=4
{2y=5-x

{3x-2y=4
{y=(5-x)/2

{3x-2((5-x)/2)=4
{y=(5-x)/2

{3x-(5-x)=4
{y=(5-x)/2

{2x-5=4
{y=(5-x)/2

{2x=9
{y=(5-x)/2

{x=4.5
{y=(5-4.5)/2

{x=4.5
{y=0.5/2

{x=4.5
{y=0.25