Question

{x+y=28
{x-y=10 ME AJUDEM

Answer 1

x= 28-y

28-y-y= 10
28-2y= 10
-2y= 10-28
-2y= - 18 (-1)
y= 18/2
y= 9

x= 28-y
x= 28-9
x= 19