Question 1121287
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Michael.  Is 1/3 of his fathers age in 13 years he will be half his fathers age how old is Michael now ?
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This way:
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Michael  is 1/3 of his fathers age.  In 13 years he will be half his father's age.  How old is Michael now ?
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Michael, f/3
Father, f
{{{f/3+13=(f+13)/2}}}
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{{{2f+6*13=3(f+13)}}}
{{{2f+78=3f+39}}}
{{{78-39=f}}}
{{{f=39}}}


Michael,  {{{f/3=39/3=highlight(13)}}}