Answer
$5(4a+1)$
Work Step by Step
The distributive law states that $a(b+c)=ab+ac$ (for real numbers $a$, $b$, and $c$).
The greatest common factor for the terms in the given expression is 5. Therefore, we can use the distributive property to factor out 5 from both terms.
$20a+5=5(4a+1)$
