Question

resolva a equacao -2[x+y]=y y+x/3= -1/6

Answer 1

-2[x+y]=y
y+x/3= -1/6

-2x-2y=y
x/3+y=-1/6

-2x-3y=0
x/3+y=1/6

-2x-3y=0
x+3y=1/2

-x=1/2
x=-1/2

1-3y=0
-3y=-1
3y=1
y=1/3

$\left \{ {{x=-1/2} \atop {y=1/3}} \right.$