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Mathematics 9 Online
OpenStudy (anonymous):

solve for the variable: log4(5)+log4(x)=log4(20)

OpenStudy (mertsj):

use the first law of logs: log a + log b = log ab

OpenStudy (anonymous):

\[\log_{4} 5+\log_{4} x=\log_{\log_{4} } 20\]

OpenStudy (anonymous):

so would the answer be 4

OpenStudy (mertsj):

yes

OpenStudy (anonymous):

details: \[\log_{4} 5+\log_{4} x=\log_{4} 20\] \[\log_{4} 5x=\log_{4} 20\] \[5x=4^{\log_{4}20 }\] \[5x=20\] \[x=4\]

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