Question

resolva por comparação. x+y=-6 2x-y=3​

Answer 1

{x+y=-6 => y= -6-x

{2x-y=3 => y= 2x-3

y = y

-6-x = 2x-3

-x-2x= -3+6

-3x=3

x= -1 ✓

y=-6-x = -6 +1= -5 ✓