This question was reportedly, attempted by majority of the candidates and their performance was described as fair.  It was also observed that candidates who attempted the question on bearing did not draw the correct diagram.  Some did not draw the diagram at all.
In part (a), candidates were expected to factorize 3x out i.e. 3x + 3x+1 = 3x (1+3) = 3x(4).  Thus, 3x + 3x+1 = 36 was the same as 3x(4) = 36 or 3x = 9 = 32.  This implied that x = 2.