Answer:
[tex]\boxed{=30r}[/tex]
[tex]\boxed{r=30}[/tex]
Step-by-step explanation:
Distributive property: ⇒ [tex]a(b+c)=a(b)+a(c)[/tex]
First you had to add 57 from both sides of an equation form.
[tex]57r+57-27+57[/tex]
[tex]57+-27=30[/tex]
Hope this helps!
And thank you for posting your question at here on brainly, and have a great day.
-Charlie
