Question 701115
Let {{{ a }}} = grandfather's age now
Let {{{ b }}} = father's age now
Let {{{ c }}} = Son's age now
The Grandfather's Grandson is the Father's Son
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given:
{{{ f = 40 }}}
{{{ 40 = 6s - 2 }}}
{{{ 6s = 42 }}}
{{{ s = 7 }}}
{{{ a = 9*s + 4 }}}
{{{ a = 9*7 + 4 }}}
{{{ a = 67 }}}
The grandfather is 67