Question

Valor 2x+3y=2
4x-9y=-1

Answer 1

Olá!!!

Resoluçao!!!

{ 2x + 3y = 2 • ( 3 )
{ 4x - 9y = - 1

{ 6x + 9y = 6
{ 4x - 9y = - 1
——————— +
10x + 0 = 5
10x = 5
x = 5/10 : 5
x = 1/2

4x - 9y = - 1
4 • ( 1/2 ) - 9y = - 1
4/2 - 9y = - 1
2 - 9y = - 1
- 9y = - 1 - 2
- 9y = - 3 • ( - 1 )
9y = 3
y = 3/9 : 3
y = 1/3

S = ( x, y ) = { 1/2, 1/3 }

Espero ter ajudado!!