text: 1. jlvm
  
  2. staceyyyy1
  
  lol(:
  
  3. satellite73
  
  \[-112=-8b-7b-7\] is the first step, i.e. multiply out using distributive law
  
  4. jlvm
  
  We have: \[-112=-8b-7(b+1)\] Multiply the 7 through: \[-112=-8b-7b-7\] Combine like terms: \[-112=-15b-7\] Multiply everything by -1: \[112=15b+7\] Substract 7: \[105=15b\] Divide by 15: \[7=b\] so, \[b=7\]