Respuesta :

nilbert
Hi there!

9 + 1/2 (7n - 26) - 8n
= 9 + 7n*1/2 - 26*1/2 - 8n
= 9 + 3.5n - 13 - 8n
= 9 - 13 + 3.5n - 8n
= -4 + 11.5n

Hope this helps!
9+3.5n-13-8n=-4.5n-4.