Question 771126
{{{10^(-3x)}}} = {{{7}}}
{{{log(10,10^(-3x))}}} = {{{log(10,7)}}}
{{{-3x*log(10,10)}}} = {{{0.8451}}}
{{{-3x*(1)}}} = {{{0.8451}}}
{{{-3x}}} = {{{0.8451}}}
{{{x}}} = {{{0.8451/(-3)}}}
{{{x}}} = {{{-0.2817}}}