jmaochoa123 jmaochoa123
  • 07-12-2020
  • Mathematics
contestada

X + y = 9
X + 3y = 13

Respuesta :

mrsaini281 mrsaini281
  • 07-12-2020

Answer: x = 7 and y = 2

X + y = 9    ----equation1

X + 3y = 13  ------equation2

-    -       -  

     -2y = -4

         y = 2

put the y value back in equation 1

x + 2 = 9

x = 9 - 2

x = 7

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