Ali,Amad and Amin share RM240. Ali's share is four times as much as Amin's and Amad's share is one-third of Amin's.How much is each of their shares?

• Let x, y, z be the share of ALi, Amad, nd Amin
  x+y+z = 240
  x = 4z
  y = z/3
  
  4z+z+(z/3) = 240
  16z = 720
  z = 45
  x = 4*z => 4*45 = 180
  y = z/3 => 45/3 = 15
  
  Share of Ali => 180
  Share of Amad => 15
  Share of Amin => 45
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