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(a) Express #1 / (x - 2)# - #2/ (x + 5)# = #3/(x + 1)# in the form of #ax^2 +bx=0#, where a, b, and c are constants hence solve for x. (b) Neema did y tests and scored a total of 120 marks. She did two more tests which she scored 13 and 14 marks. The mean score of the first y tests was 3 marks more than the mean score for all the tests she did.
Find the total number of tests that she did.