Question

x+y=30

x-y=10

x+y=27

x-y=3​

Answer 1

Respuesta

x+y=30

x-y=10

_____

   2x = 40

     x= 20

    y= 10

x+y=27

x-y=3​

_____

    2x= 30

      x= 15

      y= 12