Question 281515
{{{m}}}=mans present age
{{{s}}}=sons present age
{{{m=5s}}}"a man is 5times as old as his son."
{{{m+5=3(s+5)}}}"In 5 years he will be only 3 times as old as his son" "In 5 years" means man+5 years and son+5 years
use substitution for m and solve for s
{{{5s+5=3(s+5)}}}
{{{5s+5=3s+15)}}}
{{{2s+5=15)}}}
{{{2s=10)}}}
{{{highlight(s=5))}}}
{{{m=5s}}}
{{{m=5(5)}}}
{{{highlight(m=25)}}}