Question 378029
Let {{{f}}} = Father's age now
Let {{{j}}} = Jay's age now
given:
{{{f = 2j}}}
{{{j + 20 = (2/3)*(f + 20)}}}
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By substitution:
{{{j + 20 = (2/3)*(2j + 20)}}}
{{{j + 20 = (4/3)*j + 40/3}}}
Multiply both sides by {{{3}}}
{{{3j + 60 = 4j + 40}}}
{{{j = 20}}}
and
{{{f = 2j}}}
{{{f = 40}}}
Jay is 20 and his Father is 40