document.write( "Question 991876: A father and son's age is 50. After five years, the father is three times the age of the son. How old is their present age? \n" ); document.write( "
Algebra.Com's Answer #611881 by satyareddy22(84)\"\" \"About 
You can put this solution on YOUR website!
Let the age of father be x and the age of son be y.
\n" ); document.write( "x+y=50-----------(1)
\n" ); document.write( "x+5=3(y+5)=3y+15
\n" ); document.write( "x+5=3y+15=>x-3y=10-----(2)
\n" ); document.write( "solving (1)& (2)
\n" ); document.write( "from (1) x=50-y,substituting in(2)
\n" ); document.write( "50-y-3y=10
\n" ); document.write( "3y+y=50-10
\n" ); document.write( "4y=40=>y=40/4=10
\n" ); document.write( "y=10yrs
\n" ); document.write( "x=50-10=40=>x=40yrs
\n" ); document.write( "Therefore the age of father is 40years & age of son is 10 years.
\n" ); document.write( "
\n" );