Question 710365
Let their ages be {{{ x }}}, {{{ x+ 1 }}}, {{{ x + 2 }}}
given:
{{{ x + x + 1 + x + 2  = 63 }}}
{{{ 3x = 63 - 3 }}}
{{{ 3x = 60 }}}
{{{ x = 20 }}}
{{{ x + 1 = 21 }}}
{{{ x + 2 = 22 }}}
Their ages are 20, 21, and 22
check:
{{{ 20 + 21 + 22 = 63 }}}
{{{ 63 = 63 }}}
OK