Question

(11^x) + 2 - (11^x-1) =143

Answer 1

$11^x-11^{x-1}=143-2 \ 11^x-11^{x-1}=141 \ 11^{x-1}(11-1)=141 \ 11^{x-1}*10=141 \ 11^{x-1}= frac{141}{10} \ \ x-1=log_{11} frac{141}{10} \ \ x=log_{11} frac{141}{10} +log_{11}11 \ \ x=log_{11}( frac{141}{10}*11 ) \ \ x=log_{11} frac{1551}{10}$