-3x-ly = -16
2x +1y = 11

x = 5 ;  y =1

Step-by-step explanation:

  -3x - 1y = -16   ----------(i)

  2x + 1 y= 11  ---------(ii)  {add (i) and (ii), +1y and -1y will be eliminated}

   -x         = -5

divide both side by -1

x = 5

Plug in x = 5 in (i)

-3*5 - 1y = -16

-15 - y = -16

-y = -16 + 15

-y = -1

divide both side by (-1)

yes.. it's proven to be 36.