Respuesta :

4r + 9/4r + 14 = 5r - 3/4r + 1 - 3
4r + 9/4r + 3/4r - 5r = -14 +1 - 3
-r + 9/4r + 3/4r = -16
-r + 12/4r = -16
-r + 3r = -16
+2r = -16
r = -16/2
r = -8