Question 402463
{{{f(x)=-3x-2}}}


      1. Replace {{{f(x)}}} with {{{y}}}. 

      {{{y=-3x-2}}}



      2. Reverse the roles of {{{x}}} and {{{y}}}, that is replace every occurrence of {{{x}}} with {{{y}}} and every occurrence of {{{y}}} with {{{x}}}. 

      {{{x=-3y-2}}}



      3. Solve for {{{y}}} in terms of {{{x}}}. 

       {{{3y= -x-2}}}
       
      {{{y = (-x-2)/3}}}



      4. Replace {{{y}}} with {{{f^-1(x)}}}. 


      {{{f^-1(x)= (-x-2)/3}}}