Question

Resposta dessa conta
b)2x+y=-3
x-3y=26

Answer 1

b)
{2x+y=-3
{x-3y=26
x=26-3y
2x+y=-3
2(26-3y)+y=-3
52-6y+y=-3
-5y=-3-52
-5y=-58
y=-58/-5
y=11,6
x=26-3y
x=26-3(11,6)
x=26-34,8
x=-8,8

Answer 2

Essa aqui é a resposta correta

2x+y= -3

x-3y=26

{2x+y= -3 (*3)

{x-3y=26(*1)

{6x+3y=-9

{x-3y=26

5x=35

x=7

y=2x+y= -3

14x+y= -3

y= -3-14

y=17