Question

COMO RESOLVO O SISTEMA DE EQUAÇAO
{2x+y=x+2
{2(x-2y)=y-3

Answer 1

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

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

{x +y = 2 ×5
{2x -5y = -3

{5x +5y = 10
{2x -5y = -3

7x = 7
X = 7⁄7 = 1

x +y = 2
1 +y = 2
Y = 2 -1 = 1

S = {1,1}