<|system|>
Kyle knows that $4 = 2^{5r+1}$. What is the value of $r$? Express your answer as a common fraction.</s>.
<|user|>
Can you answer based on context?
<|assistant|>
Replacing the $4$ with $2^2$ we have $2^2 = 2^{5r+1}$, so $2=5r+1$.  Solve for $r$ to get $r=\frac{1}{5}$