Question 1001867
{{{ x = 5y }}}
{{{ x + y = 36 }}}
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By substitution:
{{{ 5y + y = 36 }}}
{{{ 6y = 36 }}}
{{{ y = 6 }}}
and
{{{ x = 5y }}}
{{{ x = 5*6 }}}
{{{ x = 30 }}}
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{{{ y }}} was born 6 years ago
6 years ago, {{{ x }}} was
{{{ 30 - 6 = 24 }}}
x was 24 when y was born