2 answers:
Hello!
Explanation:
↓↓↓↓↓↓↓↓↓↓
First you had to add by 
from both sides of the equation.
Simplify it should be the correct answer.
Answer⇒⇒⇒⇒⇒r=2
Hope this helps!
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-Charlie
Answer: radius minus pi
Step-by-step explanation:
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Step-by-step explanation:
