Question

{2x-4y=16
{-5x+6y=-28

Answer 1

{2x-4y=16 ==> *(3)

{-5x+6y=-28 => *(2) ↓

{ 6x-12y= 48

{-10x+12y=-56

------------------------ (+)

-4x = -8

x = 2 ✓

{-5x+6y=-28

-5(2)+6y= -28

6y= -28 +10

6y = -18

y = -3 ✓