Question 878799
Simple method is make {{{x=3.5^(y+2)}}} and solve for y.


{{{log((x))=(y+2)log((3.5))}}}
{{{log((x))=y*log((3.5))+2*log((3.5))}}}
{{{y*log((3.5))=log((x))-2*log((3.5))}}}
{{{highlight(y=log((x))/log((3.5))-2)}}}