21-04-2015
Mathematics

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what is the solution of 3+log(7x-2)=6

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konrad509 konrad509

21-04-2015

[tex]D:7x-2\ \textgreater \ 0\\ D:7x\ \textgreater \ 2\\ D:x\ \textgreater \ \dfrac{2}{7}\\\\ 3+\log(7x-2)=6\\ \log(7x-2)=3\\ 10^3=7x-2\\ 100=7x-2\\ 7x=102\\ x=\dfrac{102}{7}[/tex]

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