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Mathematics 18 Online
OpenStudy (anonymous):

how do I solve for x? \[3^{x+1}=7\]

OpenStudy (lalaly):

\[\log_{3} 7 = x+1\]

OpenStudy (anonymous):

I got that. but now what :(?

OpenStudy (anonymous):

subtract the 1?

OpenStudy (lalaly):

exactly

OpenStudy (anonymous):

Use the Change of Base formula on the left side and subtract the 1 from both sides if you need a decimal answer

OpenStudy (anonymous):

\[\log_{3}{7} -1 = x\] ?

jimthompson5910 (jim_thompson5910):

you got it, \[\large x=\log_{3}(7)-1\]

OpenStudy (lalaly):

yupp right :D

OpenStudy (anonymous):

thanks guys :)

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