Question 1203444


if {{{ E}}} is the midpoint of {{{ DF}}}, then {{{ EF =DF}}}

 If {{{ EF = x + 9}}} and {{{ DF = 3x + 9}}}, then

 {{{ x + 9  = 3x + 9}}}
  {{{ 9 -9 = 3x -x}}}
 {{{ 0= 2x}}}
{{{ 0= x}}}


what is {{{ DF}}}
{{{ DF = 3*0 + 9}}}

{{{ DF =  9}}}