Question 852697
1.{{{A=3S}}}
2.{{{A-10=5(S-10)}}}
Substitute from eq.1 into eq.2.
{{{3S-10=5S-50}}}
{{{-2S=-40}}}
{{{S=20}}}
and
{{{A=3S}}}
{{{A=60}}}
Aman is 60, his son 20.