Respuesta :
I reckon it would be C.. if you usually have a number beside a letter it usually means multiply them together (I think)
6 + 4 n = 18
(I think n = 3. 4 x 3 = 12. 12 + 6 = 18)
6 + 4 n = 18
(I think n = 3. 4 x 3 = 12. 12 + 6 = 18)