Warning: implode(): Invalid arguments passed in /www/wwwroot/jobquiz.info/mdiscuss.php on line 336 10 years ago father was seven times as old as his son. 2 years hence twice his age will be equal to five times his son. What is the present age of son? ?->(Show Answer!)

1. 10 years ago father was seven times as old as his son. 2 years hence twice his age will be equal to five times his son. What is the present age of son?