Respuesta :

gmany

Answer:

t - 6r

Step-by-step explanation:

[tex]8t+3r-7t-9r\qquad\text{combine like terms}\\\\=(8t-7t)+(3r-9r)\\\\=1t-6r[/tex]

Answer:

t-6r

Step-by-step explanation:

8t-7t+3r-9r

t+3r-9r

t-6r