Question 552126
Let {{{ b }}} = Bernard's age
Let {{{ r }}} = Romeo's age
given:
{{{ r = b + 3 }}}
{{{ r + b = 7 }}}
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By substitution:
{{{ ( b + 3 ) + b = 7 }}}
{{{ 2b + 3 = 7 }}}
{{{ 2b = 4 }}}
{{{ b = 2 }}}
and, since
{{{ r = b + 3 }}}
{{{ r = 2 + 3 }}}
{{{ r = 5 }}}
Bernard is 2
Romeo is 5