What does r equal?
8(r+4) = -6r +4(r-7)

   8(r +4) = -6r + 4(r-7)

Distribute the number on the left outside of the parentheses to the insides: 
   8r + 32 = -6r + 4r - 28
 
  Bring all the numbers with 'r' to the left of the equation sign:
   8r + 6r - 4r + 32 = -28
   
Subtract the 32 from both sides:
   8r + 6r - 4r + 32 = -28
                     - 32     -32

          8r + 6r - 4r  = -28 - 32
 
Combine all like terms:
                    10r   =  -60 
  

Divide by 10 to isolate r:
                   10 r  = -60 
                   10        10
 
                       r   =      

Hope this helped...

50% of students voted for candidate b.