Step-by-step explanation:
AS = Asri's height
AD = Adib's height
IR = Irfan's height
AS = 2x
AD = AS - 6 = 2x - 6
IR = 2 × AS = 2 × 2x = 4x
i)
IR = 4x
ii)
IR - AS = 4x - 2x = 2x
