Question 52665
  
  {{{-7(-2x-(3x+8)+5)-3x+7}}}
  
= {{{-7(-2x-3x-8+5)-3x+7}}}   First remove the innermost brackets.
  
= {{{-7(-5x-3)-3x+7}}}  Simplify within bracket.
  
= {{{35x+21-3x+7}}}
 
= 32x + 28    =   4(8x+7).  Answer.  I dont know where you have gone wrong to get negative 4 in the answer.

  
gsm