Question

{ x + 2y =14
{ 2x + 3y =23

Answer 1

{ x + 2y =14.(-2)
{ 2x + 3y =23.(1)

-2x-4y=-28
2x+3y=23

-4y+3y=-28+23

-y=-5

y=-5/-1

y=5

x=14-2y

x=14-2.(5)

x=14-10

x=4


s={4,5}


espero ter ajudado!

boa tarde!

Answer 2

x= 14-2y

2×(14-2y)+3y= 23
28-4y+3y= 23
28-y= 23
-y= 23-28
-y= -5
y= 5

x= 14-2y
x= 14-2×5
x= 14-10
x= 4