Question 1055701
{{{L=3S}}}
In 5 years,
{{{L+5=2(S+5)}}}
{{{L+5=2S+10}}}
{{{L=2S+5}}}
Substituting from above,
{{{3S=2S+5}}}
{{{S=5}}}
So then,
{{{L=3(5)}}}
{{{L=15}}}