Question

Log(sub 2) 3 + log(sub 2) a = log(sub 2) 20

Answer 1

\[\log_2(3)+\log_2(a)=\log_2(20)\]?

Answer 2

start by combining the logs on the left using
\[\log(x)+\log(y)=\log(xy)\] you get
\[\log_2(3a)=\log(20)\]

Answer 3

then since log is a one to one function, this means
\[3a=20\] solve for \(a\)