Question 1028707
Let {{{ c }}} = the cost of a child's ticket
given:
{{{ c = (2/3)*( c + 8.5 ) }}}
{{{ 3c = 2c + 17 }}}
{{{ c = 17 }}}
The child's ticket costs $17
--------------
check:
Adult's ticket costs {{{ 17 + 8.5= 25.5 }}}
{{{ 17 = (2/3)*25.5 }}}
{{{ 51 = 2*25.5 }}}
{{{ 51 = 51 }}}
OK