Respuesta :
If you see the below statements among the choices, then you can select these as the answers:
a.) 39 + 2k = 69
       2k = 69 - 39
     2k/2 = 30/2
        k = 15
b.) 39 + 2k = 69
 39 + 2(15) = 69
   39 + 30 = 69
       69 = 69
a.) 39 + 2k = 69
       2k = 69 - 39
     2k/2 = 30/2
        k = 15
b.) 39 + 2k = 69
 39 + 2(15) = 69
   39 + 30 = 69
       69 = 69