Question 1101555
{{{S=24}}}
.
.
{{{S=2B}}}
{{{2B=24}}}
{{{B=12}}}
.
.
n years ago,
{{{24-n=3(12-n)}}}
{{{24-n=36-3n}}}
{{{3n-n=36-24}}}
{{{2n=12}}}
Solve for n.