Question 529376
2(4r+6)*2/3(12r+18)
8r+12*8r+12
64r+144

This question can only be simplified because you did not mention what does the equation equal. We can only help if we are told what does it equal to. (For now I'll guess your equation equals '0')

64r+144=0
    64r=-144
      r=-144/64
   {{{r=-2.25}}} OR {{{r=-9/4}}}