Respuesta :

NagThiriKo

Answer:

x=? y=?

  • 5x+y=21 equation 1
  • 3x+y=13

y=13-3x

  • y=13-3x in equation 1

5x+(13-3x)=21

5x+13-3x=21

2x+13=21

2x=21-13

2x=8

x=8/2

x=4

  • x=4 in equation 1
  • 5(4)+y=21

20+y=21

y=21-20

y=1