Respuesta :

gmany

Answer:

[tex]\huge\boxed{D.\ 13.9}[/tex]

Step-by-step explanation:

[tex]-5.7+y=8.2\qquad|\text{add 5.7 to both sides}\\\\-5.7+5.7+y=8.2+5.7\\\\y=13.9[/tex]