document.write( "Question 314818: A father is three times as old as his son. After fifteen years the father will be twice as old as his son's age at that time. Hence the father's present age is \n" ); document.write( "
Algebra.Com's Answer #328003 by karthiktcs(3)\"\" \"About 
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let the present age of son be x
\n" ); document.write( "and the present age of father be 3x\r
\n" ); document.write( "\n" ); document.write( "after fifteen years
\n" ); document.write( "(3x+15)=2(x+15)\r
\n" ); document.write( "\n" ); document.write( "(3x+15)=(2x+30)
\n" ); document.write( "3x+15-2x-30=0
\n" ); document.write( "x-15=0
\n" ); document.write( "x=15\r
\n" ); document.write( "\n" ); document.write( "father age will be 3*15=45
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