Question 770112
Let {{{ f }}} = the father's age now
The difference in their ages will
always be {{{ 30 }}} years, so
{{{ f - 30 }}} = the son's age now
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{{{ f = 3*( f - 30 ) + 6 }}}
{{{ f = 3f - 90 + 6 }}}
{{{ 2f = 90 - 6 }}}
{{{ 2f = 84 }}}
{{{ f = 42 }}}
and
{{{ s = 42 - 30 }}}
{{{ s = 12 }}}
The father is 42 and the son is 12
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check:
{{{ f = 3*( f - 30 ) + 6 }}}
{{{ 42 = 3*( 42 - 30 ) + 6 }}}
{{{ 42 = 3*12 + 6 }}}
{{{ 42 = 42 }}}
OK