Question 1081868
{{{F=3J}}}
Five years ago,
{{{F-5=4(J-5)}}}
{{{F-5=4J-20}}}
{{{F=4J-15}}}
Substituting from above,
{{{3J=4J-15}}}
{{{-J=-15}}}
Solve for J then use either equation to solve for F.