Question 619364

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Hi,
a boy was 1/5 as old as his father,{{{highlight(x)}}}yrs old, boy (1/5){{{highlight(x)}}}
Question states***in 18 yrs he will be half as old as his father. 
how old is the father now ?
  {{{(1/5)x + 18 = (1/2)(x+18)}}}
    {{{(2/5)x + 36 = x+18}}}
          {{{18 = (3/5)x}}}
        {{{(5/3) 18 = x}}}
          30 = x, fathers age now