Question 1180062
let father's age be {{{f}}} and son's age {{{s}}}
if a father is {{{five}}} time as old as his son, we have

{{{f=5s}}} ....eq.1

if the sum of their age last year was {{{58 }}}years, we have

{{{(f-1)+(s-1)=58}}} 

{{{f+s-2=58}}} 

{{{f+s=58+2}}} ...substitute {{{f}}} from eq.1

{{{5s+s=60}}}

{{{6s=60}}}

{{{s=10}}}

go to

{{{f=5s}}} ....eq.1,..substitute {{{s}}}

{{{f=5*10}}}

{{{f=50}}}


 the present age of the son is {{{10}}}