Question 329043
{{{log(2,(x+20))- log(2,(x+2))= log(2,(x))}}}
{{{log(2,((x+20)/(x+2)))= log(2,(x))}}}
{{{(x+20)/(x+2)= x}}}
{{{x+20=x(x+2)}}}
{{{x+20=x^2+2x}}}
{{{x^2+x-20=0}}}
{{{(x+5)(x-4)=0}}}
Only a positive solution is allowed since the log function requires a positive argument.
{{{x-4=0}}}
{{{highlight(x=4)}}}