Question 619212
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Hi,
A father is NOW 5 times as old as his son...{{{highlight(x)}}}yrs old NOW . 
In 18 years, the father will be twice as old as his son.
   5x + 18 = 2(x+18)
    3x = 18
     x = 6yr, son's age NOW.  Father is 30 years old at the present.